AI voice agents
Asked as “AI voice agent platform”, and as “AI phone agent that answers customer calls”, on behalf of a mid-market B2B company. 53 first choices recorded across the direct, paraphrase, budget and scale prompts, fourteen models each. Added to the November 2026 Edition.
Standing · first-choice share
25%
Contested · Retell AI 17%
25CloudTalk17Retell AI08Vapi51others
25% of first choices, contested.
Since October 2026↗new leaderNew leader since October 2026: CloudTalk (25%) replaces Retell AI (27% then, 17% now), 8 points clear, inside the 11-point floor.CloudTalk leads at 25%, replacing Retell AI, which led at 27% and stands at 17% now: 8 points clear, inside the floor, so the swap reads as unsettled.
By buyer segment
The same question asked on behalf of a different buyer. Each standing is computed within its segment; they sit side by side and are never added together.
Small business
Retell AI15%Contested▼−5Since October 2026: 20% → 15%, −5 points. Inside the 11-point floor: within noise.Standing →Mid-market
CloudTalk25%Contested↗new leaderNew leader since October 2026: CloudTalk (25%) replaces Retell AI (27% then, 17% now), 8 points clear, inside the 11-point floor.This pageEnterprise
Synthflow19%Contested↗new leaderNew leader since October 2026: Synthflow (19%) replaces PolyAI (21% then, 13% now), 6 points clear, inside the 11-point floor.Standing →
Retell AI15%Contested▼−5Since October 2026: 20% → 15%, −5 points. Inside the 11-point floor: within noise.Standing →Mid-marketCloudTalk25%Contested↗new leaderNew leader since October 2026: CloudTalk (25%) replaces Retell AI (27% then, 17% now), 8 points clear, inside the 11-point floor.This pageEnterpriseSynthflow19%Contested↗new leaderNew leader since October 2026: Synthflow (19%) replaces PolyAI (21% then, 13% now), 6 points clear, inside the 11-point floor.Standing →The standing
Share is the count of first choices across the direct, paraphrase, budget and scale prompts, over all fourteen models, for a mid-market B2B company. Ordered by share.
ProductFirst-choice shareNegative rateLabelsQuadrantSince October 2026
01CloudTalk25%0%23accepted challenger▲+6Since October 2026: 19% → 25%, +6 points. Inside the 11-point floor: within noise.19% → 25%
CloudTalk25%0%23accepted challenger▲+6Since October 2026: 19% → 25%, +6 points. Inside the 11-point floor: within noise.19% → 25%02Retell AI17%7%55accepted challenger▼−10Since October 2026: 27% → 17%, −10 points. Inside the 11-point floor: within noise.27% → 17%
Retell AI17%7%55accepted challenger▼−10Since October 2026: 27% → 17%, −10 points. Inside the 11-point floor: within noise.27% → 17%03
Vapi8%12%52accepted challenger▼−8Since October 2026: 16% → 8%, −8 points. Inside the 11-point floor: within noise.16% → 8%
Vapi8%12%52accepted challenger▼−8Since October 2026: 16% → 8%, −8 points. Inside the 11-point floor: within noise.16% → 8%04Synthflow4%17%36accepted challenger▲+1Since October 2026: 3% → 4%, +1 point. Inside the 11-point floor: within noise.3% → 4%
Synthflow4%17%36accepted challenger▲+1Since October 2026: 3% → 4%, +1 point. Inside the 11-point floor: within noise.3% → 4%05
PolyAI2%21%24accepted challenger▲+2Since October 2026: 0% → 2%, +2 points. Inside the 11-point floor: within noise.0% → 2%
PolyAI2%21%24accepted challenger▲+2Since October 2026: 0% → 2%, +2 points. Inside the 11-point floor: within noise.0% → 2%06
ElevenLabs2%30%20criticized challenger▲+2Since October 2026: 0% → 2%, +2 points. Inside the 11-point floor: within noise.0% → 2%
ElevenLabs2%30%20criticized challenger▲+2Since October 2026: 0% → 2%, +2 points. Inside the 11-point floor: within noise.0% → 2%Show the two products at 0%, ordered by negative rate
08
Cognigy0%30%10criticized challenger=heldSince October 2026: 0% → 0%, ±0 points. Inside the 11-point floor: within noise.0% → 0%
Cognigy0%30%10criticized challenger=heldSince October 2026: 0% → 0%, ±0 points. Inside the 11-point floor: within noise.0% → 0%07
Bland AI0%12%33accepted challenger▼−3Since October 2026: 3% → 0%, −3 points. Inside the 11-point floor: within noise.3% → 0%
Bland AI0%12%33accepted challenger▼−3Since October 2026: 3% → 0%, −3 points. Inside the 11-point floor: within noise.3% → 0%The floor is 11 points of share, measured: how far the models move a leader on their own when the same questions are asked twice with nothing changed. A larger change is movement; a smaller one can't be told apart from repeat variation, and both are shown. Each index measures its own floor from its own repeat, over its own categories, so the floor differs from one index to the next. Both editions asked the same fourteen models. How the floor is measured
Bars are the share of first choices, 0 to 100Every product with at least 10 labels here. Every product name links to its product page.
For buyers
All fifteen head-to-head pages: the top six products, each against each
Recommended versus criticized
Every product with at least 10 labels here, on both axes. The 30% line names a quadrant, not the verdict above: that one needs more than 40%.
Criticized challengerCriticized default
Negative label rate →
0102030405060708Accepted challengerEndorsed leader
0%First-choice share → · lines at 30% share and 25% negative40%
Key
01CloudTalk25%
CloudTalk25%02Retell AI17%
Retell AI17%03Vapi8%
Vapi8%04Synthflow4%
Synthflow4%05PolyAI2%
PolyAI2%06ElevenLabs2%
ElevenLabs2%07Bland AI0%
Bland AI0%08Cognigy0%
Cognigy0%What they warned about
Three of fourteen models held their first choice under the paraphrase. Claude Haiku 4.5, GPT-5.4 mini, Gemini 3.5 Flash, Perplexity Sonar, Grok 4.20, Mistral Small, DeepSeek V4 Flash, Kimi K2, GLM 4.7 FlashX, MiniMax M2.5 and GPT-6 Luna changed. A high negative share on a product with few labels is a warning. A low share on a product with many labels is salience, not sentiment.
Synthflow17%
6 of 36 labels negative · 6 of 14 models · 2 hard negative
“Mistral Small warns that Synthflow may not scale well for call volumes exceeding 5,000 calls per month.” Llama 4 Maverick, negative prompt
Vapi12%
6 of 52 labels negative · 6 of 14 models · 2 hard negative
“Multiple AI model reviews flag Vapi with a high negative share (43% negative labels in one analysis).” Mistral Small, negative prompt
ElevenLabs30%
6 of 20 labels negative · 5 of 14 models · 2 hard negative
“basic ones like ElevenLabs/Goodcall (better for very small teams or voice quality focus only)” Grok 4.20, paraphrase prompt
PolyAI21%
5 of 24 labels negative · 4 of 14 models · 3 hard negative
“Avoid enterprise-heavy options like PolyAI or Cognigy unless your needs are highly regulated” Grok 4.20, direct prompt
What they cite
Fourteen of the fourteen models returned a source list in this edition: five return the pages they cited and nine the search results they consulted.
Sites the answers cite
76 of 84 answers in this category came back with a source list, from 14 of 14 models: citations where the model returns them, or the search results it consulted. 808 links across 249 sites, every framing counted. Ranked by the number of answers carrying the site or page. 6 of the 252 answers across every segment cited this index's own page for the category; the method page measures whether that reading tilts an answer.
vendor site · CloudTalk30 answers · 55 citations · 11 models
vendor site · Synthflow27 answers · 36 citations · 9 models
vendor site · Retell AI26 answers · 32 citations · 12 models
19 answers · 22 citations · 9 models
vendor site · Bland18 answers · 20 citations · 9 models
18 answers · 18 citations · 9 models
vendor site · Botphonic17 answers · 21 citations · 8 models
vendor site · JustCall14 answers · 23 citations · 8 models
vendor site · Cartesia14 answers · 14 citations · 9 models
vendor site · Kore.ai13 answers · 14 citations · 8 models
vendor site · Murf12 answers · 15 citations · 7 models
vendor site · ElevenLabs12 answers · 12 citations · 7 models
Pages the answers cite
The ten pages named in the most answers, by full address. A page here is one the models returned with a recommendation, not one the index endorses.
18 answers · 8 models
18 answers · 9 models
17 answers · 8 models
14 answers · 9 models
14 answers · 7 models
13 answers · 8 models
13 answers · 6 models
11 answers · 7 models
10 answers · 6 models
9 answers · 5 models
Search against answers
Each company's standing in the answers beside its site's footprint in Google search, one row a site: the products the models named on it with their shares, and the share they add up to; monthly searches on Google, and DataForSEO's estimate of AI search demand (modeled from search signals, directional, not a count of queries to any assistant), for the most-searched of the company's and its products' names (the name is in each row's hover text); estimated monthly organic visits to the site; and its best position in Google's top ten for “ai voice agent platform”, “best ai voice agent platform”. US estimates from DataForSEO and Google's Ads Transparency Center. A small company's site, or a mid-sized company's site for its flagship, is marked company; a product on a large parent's site (Google, Microsoft) has no site figures. A column with no figures for this category is left out, and an empty cell means none were seen, not none exist. Two measurements side by side: neither is read as the cause of the other.
| Company and products | Share | Own site cited | Name searches, Google | AI search demand, est. | Organic visits | Paid search a month, est. | Google ads, last 30 days | Best Google position |
|---|---|---|---|---|---|---|---|---|
| CloudTalk cloudtalk.io CloudTalk 25%, CloudTalk AI 2% | 26% | 364 | 2,900 | 62 | 95,515 | $1,909 | 119 | 2 |
| Retell AI retellai.com | 17% | 147 | 22,200 | 177 | 105,030 | 14 | 3 | |
| Vapi vapi.ai | 8% | 132 | 14,800 | 468 | 30,606 | 13 | ||
| JustCall justcall.io JustCall 4%, JustCall AI Voice Agent 4% | 8% | 157 | 8,100 | 178 | 587,743 | $127 | 120 | |
| Upfirst upfirst.ai | 6% | 8 | ||||||
| Synthflow synthflow.ai | 4% | 98 | 2,400 | 24 | 15,596 | 0 | ||
| Botphonic botphonic.ai | 4% | 25 | ||||||
| Aloware aloware.com | 4% | 28 | 2,900 | 13 | 27,544 | $442 | 24 | |
| Quo Sona | 4% | |||||||
| PolyAI poly.ai | 2% | 58 | 823,000 | 93 | 336,300 | $74 | 120 |
Google's top ten for the two searches hold 15 sites; 2 of them are among the sites the models cited here (cloudtalk.io, retellai.com). The first result for “ai voice agent platform” is callrail.com.
How they answered
Six framings of the same buying question, each sent to every model in a fresh session with search on. One row per model, so a row shows whether it held its answer under rewording, what it named when cost was the constraint, and what it argued against. Computed from the raw judge labels.ShowHide
How they answered
Six framings of the same buying question, each sent to every model in a fresh session with search on. One row per model, so a row shows whether it held its answer under rewording, what it named when cost was the constraint, and what it argued against. Computed from the raw judge labels.
ShowHideModelDirect“What is the best AI voice agent platform for a mid-market B2B company?”Paraphrase“Which AI phone agent that answers customer calls would you recommend to a mid-sized B2B company?”Comparative“What are the top AI voice agent platforms and how do they differ?”Budget-constrained“What is the best AI voice agent platform for a company with a limited budget?”Scale-constrained“We are a 500 person company evaluating an AI voice agent platform. What should we look at?”Negative“Which AI voice agent platforms should I avoid or be cautious about?”
Claude Haiku 4.5Aloware, CloudTalkAlowareChangedno first choiceThoughtlyno first choicenothing named
Four alternatives
ElevenLabs Agents, Retell AI, Synthflow, VapiTwo alternatives
CloudTalk, Julian AI Sales AgentSeven alternatives
Bland AI, ElevenLabs, Lindy, PolyAI, Retell AI, Synthflow, VapiFive alternatives
My AI Front Desk, Nextiva's XBert AI receptionist, Retell AI, Vapi, VocodeGPT-5.4 miniTalkdeskRetell AIChangedno first choiceVapino first choiceagainst: ElevenLabs, Kore.ai, Retell AI, Vapi
Four alternatives
ElevenLabs, Genesys Cloud CX, OpenAI Presence, VapiTwo alternatives
PolyAI, TalkdeskThree alternatives
Deepgram Voice Agent API, ElevenLabs, Twilio Voice AIGemini 3.5 FlashRetell AICloudTalk, JustCallChangedRetell AI, VapiVapino first choiceagainst: ElevenLabs, OpenAI
Four alternatives
Regal.io, Sierra, Synthflow AI, VapiFour alternatives
PolyAI, Retell AI, Sierra, Synthflow AISeven alternatives
Bland AI, CloudTalk, LiveKit Agents SDK, OpenAI Realtime API, Pipecat, Synthflow AI, VoiceflowFive alternatives
Bland AI, Pipecat, Retell AI, Synthflow AI, VocodePerplexity SonarCloudTalkagainst: Kore.aiCloudTalk AIChangedRetell AISynthflowno first choiceagainst: Bland AI, ElevenLabs, Goodcall, LOVO.ai, PolyAI, Retell AI, Synthflow, Vapi, Yellow.ai
One alternative
Retell AIFour alternatives
Nextiva XBert, PolyAI, Retell AI, SynthflowNine alternatives
Bland AI, Cognigy, ElevenLabs Agents, NiCE Cognigy, PolyAI, Rasa Voice, Sierra, Synthflow, VapiThree alternatives
Goodcall, Nextiva XBert, VapiGrok 4.20CloudTalkagainst: Cognigy, PolyAIRetell AI, VapiChangedagainst: Cognigy, ElevenLabs, Genesys Cloud CX, GoodcallRetell AIagainst: Twilio Voice AI, Zendesk VoiceBotphonic, Quo's Sonaagainst: Nextivano first choiceagainst: Bland AI, ElevenLabs, Hume EVI, PolyAI, Retell AI, Synthflow, Thoughtly, Vapi
Two alternatives
Retell AI, VapiFive alternatives
Botphonic, JustCall AI, PolyAI, Synthflow, Zendesk's native AI voice agentsFour alternatives
Bland AI, PolyAI, Synthflow, VapiFive alternatives
Bland AI, My AI Front Desk, Retell AI, Upfirst, VapiEight alternatives
Aircall, Assembled, Bland AI, CloudTalk, PolyAI, Retell AI, Synthflow, VapiMistral SmallKore.ai, Synthflowagainst: NICE CXoneJustCall AI Voice AgentChangedno first choiceDialzara, Upfirstno first choiceagainst: Retell AI, Synthflow, Vapi
One alternative
Girikon AITwo alternatives
Botphonic, CloudTalkThree alternatives
Goodcall, Murf AI, My AI Front DeskDeepSeek V4 FlashCloudTalkJustCall AI Voice AgentChangedagainst: Aircall, SynthflowRetell AIUpfirstPolyAIagainst: Air.ai
Five alternatives
ElevenLabs Conversational AI, JustCall, Retell AI, Synthflow, VapiTwo alternatives
CloudTalk, Nextiva XBertTen alternatives
Amazon Connect, Bland AI, Deepgram Voice Agent API, ElevenLabs Agents, Google Dialogflow CX, LiveKit Agents, PolyAI, Synthflow, Twilio Voice AI, VapiThree alternatives
ElevenLabs Agents, My AI Front Desk, Retell AISix alternatives
Amazon Connect, Bland AI, Plivo, Retell AI, Synthflow, VapiLlama 4 MaverickCloudTalkCloudTalkHeldno first choiceFreJun Telerno first choiceagainst: Bland AI, Synthflow, Vapi
Five alternatives
Aircall, Bland AI, CloudTalk, Retell AI, VapiQwen 3.7 FlashCloudTalkCloudTalkHeldRetell AI, VapiVapino first choicenothing named
Five alternatives
Cresta, Microsoft Copilot Studio, Retell AI, Synthflow AI, VapiTwo alternatives
Botphonic, HubSpot Voice AIThree alternatives
Bland AI, Kore.ai, NICE CXoneThree alternatives
Dapta, Retell AI, Smith.aiKimi K2Retell AIagainst: Bland AICloudTalk, JustCallChangedagainst: Goodcall, PolyAI, RosieRetell AIQuo Sona, Upfirstno first choiceagainst: Air.ai, Voice.ai
Two alternatives
CloudTalk, SynthflowTwo alternatives
DevRev, Smith.aiSix alternatives
Bland AI, Cognigy, Kolsetu Elba, PolyAI, Synthflow, VapiFive alternatives
Botphonic, Dialzara, My AI Front Desk, Retell AI, VapiGLM 4.7 FlashXRetell AIBotphonicChangedagainst: Twilio Voice AIRetell AIagainst: Amazon Connect, Twilio FlexEdesyno first choicenothing named
Four alternatives
Aircall, CloudTalk, Synthflow, VapiOne alternative
Dialpad AI AgentsFour alternatives
Bland AI, Cognigy, Kore.ai, VapiThree alternatives
Autocalls, My AI Front Desk, Synthflow AIMiniMax M2.5CloudTalk, Five9against: PolyAIRetell AIChangedVapiElevenLabs, Quo Sonano first choicenothing named
Two alternatives
Retell AI, SynthflowTwo alternatives
Olivia AI, VapiSix alternatives
Amazon Connect, Bland AI, Google Dialogflow CX, Kore.ai, Retell AI, SynthflowFour alternatives
LuMay Voice Agent, Retell AI, Upfirst, VapiGPT-6 LunaRetell AIAircall AI Voice AgentChangedno first choiceRetell AIno first choiceagainst: ElevenLabs Agents, Google Dialogflow CX, Vapi
Three alternatives
PolyAI, Synthflow, VapiTwo alternatives
Retell AI, Smith.ai's hybrid serviceSeven alternatives
Bland AI, Deepgram Voice Agent API, ElevenLabs Agents, PolyAI, Retell AI, Synthflow, VapiTwo alternatives
Bland AI, VapiMuse Glimmer 30BCloudTalkagainst: Cognigy, Kore.ai, SynthflowCloudTalkHeldno first choiceRetell AIno first choiceagainst: Descript, ElevenLabs, Fish Audio / fish.audio, Lovo, Meta's Muse, PlayHT, Resemble AI, Speechify
Three alternatives
Nextiva XBert, Retell AI, VapiThree alternatives
Aloware, Botphonic, SynthflowSeven alternatives
Bland AI, Cartesia Managed Agents, ElevenLabs Conversational AI, LiveKit Agents, Pipecat, Retell AI, VapiThree alternatives
Goodcall, Murf AI, RosieBold is the first choiceAlternatives are counted; the count opens them.What the answer argued against
The record
One row per call: the version string exactly as returned, whether the model searched, sources cited, and latency.
Eighty-four rows: every prompt, every model, every answer.
| Prompt | Model | Version string | Time (UTC) | Searched | Sources | Latency |
|---|---|---|---|---|---|---|
| Direct recommendation | Claude Haiku 4.5 | claude-haiku-4-5-20251001 | 2026-11-01 15:44 | yes | 16 | 10 s |
| Direct recommendation | GPT-5.4 mini | gpt-5.4-mini-2026-03-17 | 2026-11-01 11:41 | yes | 4 | 5 s |
| Direct recommendation | Gemini 3.5 Flash | gemini-3.6-flash (asked for gemini-3.5-flash; the API answered as this version) | 2026-11-01 17:13 | yes | 14 | 22 s |
| Direct recommendation | Perplexity Sonar | sonar | 2026-11-01 09:16 | yes | 10 | 4 s |
| Direct recommendation | Grok 4.20 | spacexai/grok-4.20-non-reasoning via xai | 2026-11-01 16:09 | yes | 5 | 9 s |
| Direct recommendation | Mistral Small | mistral/mistral-small via mistral | 2026-11-01 10:06 | yes | 5 | 5 s |
| Direct recommendation | DeepSeek V4 Flash | deepseek/deepseek-v4-flash via deepinfra | 2026-11-01 10:37 | yes | 24 | 26 s |
| Direct recommendation | Llama 4 Maverick | meta/llama-4-maverick via bedrock | 2026-11-01 12:53 | yes | 5 | 3 s |
| Direct recommendation | Qwen 3.7 Flash | alibaba/qwen3.7-flash via alibaba | 2026-11-01 16:59 | yes | 10 | 37 s |
| Direct recommendation | Kimi K2 | moonshotai/kimi-k2 via novita | 2026-11-01 12:31 | yes | 14 | 34 s |
| Direct recommendation | GLM 4.7 FlashX | zai/glm-4.7-flashx via zai | 2026-11-01 12:59 | yes | 10 | 40 s |
| Direct recommendation | MiniMax M2.5 | minimax/minimax-m2.5 via minimax | 2026-11-01 11:40 | yes | 5 | 24 s |
| Direct recommendation | GPT-6 Luna | gpt-6-luna | 2026-11-01 11:29 | yes | 4 | 14 s |
| Direct recommendation | Muse Glimmer 30B | meta/muse-glimmer-30b via togetherai | 2026-11-01 11:21 | yes | 14 | 19 s |
| Paraphrase | Claude Haiku 4.5 | claude-haiku-4-5-20251001 | 2026-11-01 10:23 | yes | 18 | 9 s |
| Paraphrase | GPT-5.4 mini | gpt-5.4-mini-2026-03-17 | 2026-11-01 10:04 | yes | 3 | 4 s |
| Paraphrase | Gemini 3.5 Flash | gemini-3.6-flash (asked for gemini-3.5-flash; the API answered as this version) | 2026-11-01 10:18 | yes | 12 | 21 s |
| Paraphrase | Perplexity Sonar | sonar | 2026-11-01 09:17 | yes | 10 | 4 s |
| Paraphrase | Grok 4.20 | spacexai/grok-4.20-non-reasoning via xai | 2026-11-01 15:21 | yes | 5 | 14 s |
| Paraphrase | Mistral Small | mistral/mistral-small via mistral | 2026-11-01 16:50 | yes | 5 | 5 s |
| Paraphrase | DeepSeek V4 Flash | deepseek/deepseek-v4-flash via deepinfra | 2026-11-01 15:46 | yes | 21 | 33 s |
| Paraphrase | Llama 4 Maverick | meta/llama-4-maverick via bedrock | 2026-11-01 12:25 | yes | 5 | 3 s |
| Paraphrase | Qwen 3.7 Flash | alibaba/qwen3.7-flash via alibaba | 2026-11-01 16:59 | yes | 5 | 32 s |
| Paraphrase | Kimi K2 | moonshotai/kimi-k2 via novita | 2026-11-01 14:08 | yes | 19 | 53 s |
| Paraphrase | GLM 4.7 FlashX | zai/glm-4.7-flashx via zai | 2026-11-01 10:54 | yes | 24 | 29 s |
| Paraphrase | MiniMax M2.5 | minimax/minimax-m2.5 via minimax | 2026-11-01 15:53 | yes | 5 | 19 s |
| Paraphrase | GPT-6 Luna | gpt-6-luna | 2026-11-01 15:35 | yes | 3 | 20 s |
| Paraphrase | Muse Glimmer 30B | meta/muse-glimmer-30b via togetherai | 2026-11-01 11:33 | yes | 14 | 16 s |
| Comparative | Claude Haiku 4.5 | claude-haiku-4-5-20251001 | 2026-11-01 15:48 | yes | 9 | 9 s |
| Comparative | GPT-5.4 mini | gpt-5.4-mini-2026-03-17 | 2026-11-01 13:11 | yes | 6 | 9 s |
| Comparative | Gemini 3.5 Flash | gemini-3.6-flash (asked for gemini-3.5-flash; the API answered as this version) | 2026-11-01 12:43 | yes | 12 | 27 s |
| Comparative | Perplexity Sonar | sonar | 2026-11-01 16:46 | yes | 10 | 6 s |
| Comparative | Grok 4.20 | spacexai/grok-4.20-non-reasoning via xai | 2026-11-01 15:59 | yes | 10 | 16 s |
| Comparative | Mistral Small | mistral/mistral-small via mistral | 2026-11-01 08:35 | yes | 5 | 8 s |
| Comparative | DeepSeek V4 Flash | deepseek/deepseek-v4-flash via deepinfra | 2026-11-01 10:08 | yes | 23 | 35 s |
| Comparative | Llama 4 Maverick | meta/llama-4-maverick via bedrock | 2026-11-01 09:53 | yes | 5 | 2 s |
| Comparative | Qwen 3.7 Flash | alibaba/qwen3.7-flash via alibaba | 2026-11-01 11:06 | yes | 5 | 34 s |
| Comparative | Kimi K2 | moonshotai/kimi-k2 via novita | 2026-11-01 14:41 | yes | 10 | 20 s |
| Comparative | GLM 4.7 FlashX | zai/glm-4.7-flashx via zai | 2026-11-01 13:50 | yes | 24 | 86 s |
| Comparative | MiniMax M2.5 | minimax/minimax-m2.5 via minimax | 2026-11-01 17:36 | yes | 15 | 25 s |
| Comparative | GPT-6 Luna | gpt-6-luna | 2026-11-01 10:55 | yes | 7 | 18 s |
| Comparative | Muse Glimmer 30B | meta/muse-glimmer-30b via togetherai | 2026-11-01 15:17 | yes | 14 | 31 s |
| Budget constrained | Claude Haiku 4.5 | claude-haiku-4-5-20251001 | 2026-11-01 14:53 | yes | 9 | 8 s |
| Budget constrained | GPT-5.4 mini | gpt-5.4-mini-2026-03-17 | 2026-11-01 13:16 | yes | 5 | 6 s |
| Budget constrained | Gemini 3.5 Flash | gemini-3.6-flash (asked for gemini-3.5-flash; the API answered as this version) | 2026-11-01 13:04 | yes | 8 | 22 s |
| Budget constrained | Perplexity Sonar | sonar | 2026-11-01 11:27 | yes | 10 | 5 s |
| Budget constrained | Grok 4.20 | spacexai/grok-4.20-non-reasoning via xai | 2026-11-01 17:04 | yes | 5 | 12 s |
| Budget constrained | Mistral Small | mistral/mistral-small via mistral | 2026-11-01 08:52 | yes | 5 | 9 s |
| Budget constrained | DeepSeek V4 Flash | deepseek/deepseek-v4-flash via deepinfra | 2026-11-01 12:21 | yes | 25 | 26 s |
| Budget constrained | Llama 4 Maverick | meta/llama-4-maverick via bedrock | 2026-11-01 10:50 | yes | 6 | 3 s |
| Budget constrained | Qwen 3.7 Flash | alibaba/qwen3.7-flash via alibaba | 2026-11-01 14:49 | yes | 10 | 30 s |
| Budget constrained | Kimi K2 | moonshotai/kimi-k2 via novita | 2026-11-01 08:35 | yes | 9 | 18 s |
| Budget constrained | GLM 4.7 FlashX | zai/glm-4.7-flashx via zai | 2026-11-01 12:04 | yes | 10 | 23 s |
| Budget constrained | MiniMax M2.5 | minimax/minimax-m2.5 via minimax | 2026-11-01 16:12 | yes | 9 | 28 s |
| Budget constrained | GPT-6 Luna | gpt-6-luna | 2026-11-01 16:00 | yes | 3 | 15 s |
| Budget constrained | Muse Glimmer 30B | meta/muse-glimmer-30b via togetherai | 2026-11-01 11:18 | yes | 12 | 28 s |
| Scale constrained | Claude Haiku 4.5 | claude-haiku-4-5-20251001 | 2026-11-01 12:55 | no | 0 | 7 s |
| Scale constrained | GPT-5.4 mini | gpt-5.4-mini-2026-03-17 | 2026-11-01 16:24 | no | 0 | 7 s |
| Scale constrained | Gemini 3.5 Flash | gemini-3.6-flash (asked for gemini-3.5-flash; the API answered as this version) | 2026-11-01 11:49 | no | 0 | 21 s |
| Scale constrained | Perplexity Sonar | sonar | 2026-11-01 17:02 | yes | 10 | 9 s |
| Scale constrained | Grok 4.20 | spacexai/grok-4.20-non-reasoning via xai | 2026-11-01 15:54 | yes | 15 | 17 s |
| Scale constrained | Mistral Small | mistral/mistral-small via mistral | 2026-11-01 13:30 | no | 0 | 8 s |
| Scale constrained | DeepSeek V4 Flash | deepseek/deepseek-v4-flash via deepinfra | 2026-11-01 12:22 | yes | 25 | 34 s |
| Scale constrained | Llama 4 Maverick | meta/llama-4-maverick via bedrock | 2026-11-01 12:40 | yes | 5 | 2 s |
| Scale constrained | Qwen 3.7 Flash | alibaba/qwen3.7-flash via alibaba | 2026-11-01 12:31 | yes | 10 | 41 s |
| Scale constrained | Kimi K2 | moonshotai/kimi-k2 via novita | 2026-11-01 09:08 | yes | 10 | 41 s |
| Scale constrained | GLM 4.7 FlashX | zai/glm-4.7-flashx via zai | 2026-11-01 11:50 | no | 0 | 70 s |
| Scale constrained | MiniMax M2.5 | minimax/minimax-m2.5 via minimax | 2026-11-01 15:55 | yes | 10 | 29 s |
| Scale constrained | GPT-6 Luna | gpt-6-luna | 2026-11-01 09:28 | yes | 4 | 16 s |
| Scale constrained | Muse Glimmer 30B | meta/muse-glimmer-30b via togetherai | 2026-11-01 12:23 | yes | 13 | 23 s |
| Negative framing | Claude Haiku 4.5 | claude-haiku-4-5-20251001 | 2026-11-01 12:02 | no | 0 | 4 s |
| Negative framing | GPT-5.4 mini | gpt-5.4-mini-2026-03-17 | 2026-11-01 11:10 | yes | 2 | 5 s |
| Negative framing | Gemini 3.5 Flash | gemini-3.6-flash (asked for gemini-3.5-flash; the API answered as this version) | 2026-11-01 10:54 | yes | 13 | 17 s |
| Negative framing | Perplexity Sonar | sonar | 2026-11-01 11:29 | yes | 10 | 5 s |
| Negative framing | Grok 4.20 | spacexai/grok-4.20-non-reasoning via xai | 2026-11-01 14:09 | yes | 10 | 13 s |
| Negative framing | Mistral Small | mistral/mistral-small via mistral | 2026-11-01 08:42 | yes | 5 | 4 s |
| Negative framing | DeepSeek V4 Flash | deepseek/deepseek-v4-flash via deepinfra | 2026-11-01 14:08 | yes | 23 | 33 s |
| Negative framing | Llama 4 Maverick | meta/llama-4-maverick via bedrock | 2026-11-01 12:51 | yes | 5 | 2 s |
| Negative framing | Qwen 3.7 Flash | alibaba/qwen3.7-flash via alibaba | 2026-11-01 10:26 | no | 0 | 39 s |
| Negative framing | Kimi K2 | moonshotai/kimi-k2 via novita | 2026-11-01 10:51 | yes | 25 | 56 s |
| Negative framing | GLM 4.7 FlashX | zai/glm-4.7-flashx via zai | 2026-11-01 09:40 | yes | 25 | 41 s |
| Negative framing | MiniMax M2.5 | minimax/minimax-m2.5 via minimax | 2026-11-01 08:40 | no | 0 | 34 s |
| Negative framing | GPT-6 Luna | gpt-6-luna | 2026-11-01 14:10 | yes | 3 | 23 s |
| Negative framing | Muse Glimmer 30B | meta/muse-glimmer-30b via togetherai | 2026-11-01 16:25 | yes | 15 | 22 s |
Normalization in this category
Every judgment call made between the raw labels and the numbers above, listed so it is visible and reversible.
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Category-scoped readings
AssemblyAI read as AssemblyAI Voice Agent API
Bland read as Bland AI
Deepgram read as Deepgram Voice Agent API
Genesys read as Genesys Cloud CX
Google Dialogflow read as Google Dialogflow CX
LiveKit read as LiveKit Agents
Rasa read as Rasa Voice
Retell read as Retell AI
Synthflow.ai read as Synthflow
Twilio read as Twilio Voice AI
Twilio (Programmable Voice + Flex) read as Twilio Voice AI
Twilio Voice / Virtual Agent / AI stack read as Twilio Voice AI
Vapi AI read as Vapi
Vapi.ai read as Vapi
Unresolved, counted raw
Aircall AI Voice Agent
Azure Cognitive Services
Bland.ai
CloudTalk AI
Computer by DevRev
Deepgram infrastructure
Edesy
Fish Audio / fish.audio
FreJun Teler
Girikon AI
Google Cloud Text-to-Speech
Google Gemini Live API
Hanc.ai
HubSpot Voice AI
Hume EVI (Empathic Voice Interface)
Kolsetu Elba
LOVO.ai
LiveKit Agents SDK
Microsoft Azure AI Speech
Nextiva's XBert AI receptionist
Olivia AI (Pete & Gabi)
OpenAI
OpenAI Realtime API (GPT-4o / GPT-Realtime)
OpenAI Voice Agents / Realtime / GPT-Live
Regal.io
Rime
Ringly
Smith.ai's hybrid service
Telnyx AI Assistants
Vision Agents
Zendesk Voice
Zendesk's native AI voice agents
Discontinued, still offered
No shut-down product was recommended here.