AI voice tools with an API

Figure and bar: visits/mo, estimate · year: online since

1. #2E

   ElevenLabsMCP · sign-in

   Generates synthetic speech, creates videos and music, and deploys conversational voice agents across 70 languages.

   1.4M
   Active
   From $6/mo
   2022
2. #4D

   Dialaxy

   Cloud phone system with call routing, voicemail, SMS, and CRM integration for contact centers.

   953k
   From $15/mo
3. #6F

   Fish Audio

   Generates expressive speech from text with voice cloning and emotional control.

   224k
   Active
   From $11/mo
4. #8Q

   quackrMCP · sign-in

   Provides temporary and private phone numbers that receive SMS messages for account verification, with an API and an email option.

   72.2k
   From $0.10 per use
   2018
5. #10V

   Vapi

   Builds and deploys voice AI agents that handle customer support, lead qualification, and appointment scheduling calls.

   32.1k
   Active
   From $0.01 per use
6. #11A

   AssemblyAI

   Transcribes and understands speech from pre-recorded and real-time audio via APIs.

   18.7k
   Active
   From $0.21 per use
7. #12D

   Deepgram

   Converts speech to text and text to speech with real-time voice agent orchestration via unified API.

   17.6k
   Active
   From $0.00 per use
   2015
8. #15B

   Bland

   Automates phone calls for enterprises using voice AI agents that run on your infrastructure.

   11.6k
   Active
   From $0.14 per use
9. #17S

   Synthflow

   Builds and deploys voice AI agents that handle inbound and outbound phone calls through proprietary telephony infrastructure.

   10.9k
   Active
   Contact sales
   2023
10. #18I

    Inworld Support Agents

    Provides realtime text-to-speech, speech-to-text, and voice agent infrastructure for consumer applications.

    9.5k
    Active
    From $25/mo
    2021
11. #19C

    Cartesia

    Generates speech, transcribes audio, and deploys voice agents for real-time conversations.

    9k
    Active
    From $5/mo
12. #20D

    didlogicMCP · sign-in

    Provides SIP trunks and DID phone numbers that route voice calls and SMS between VoIP systems and the public phone network.

    7.6k
    Active
    From $0.01 per use
    2006
13. #25S

    Speechmatics

    Provides speech-to-text and text-to-speech APIs for multilingual conversations with low latency and high accuracy.

    5.8k
    Active
    From $0.13 per use
    2006
14. #26S

    Smallest.ai

    Provides speech-to-text, text-to-speech and voice agent models through APIs for real-time phone and app conversations.

    4.8k
    Active
    From $0.09 per use
    2023
15. #27S

    Speechify API

    Provides a text-to-speech API with voice cloning and emotion control, plus real-time voice agents that handle phone calls.

    3.8k
    Active
    From $10 per use
16. #28F

    FreJun

    Provides cloud calling for business teams: a dialer integrated with CRMs, inbound call routing with IVR, call recording and a voice API for developers.

    3.4k
    Active
    From $16.99/user/mo
17. #34T

    Transgate AI

    Transcribes audio and video to text, summarizes content, and enables chat queries across 50 languages.

    2k
    Active
    From $1.49 per use
    2023
18. #41C

    Callbookit AI

    AI voice agent calls businesses and books reservations on your behalf.

    766
    Maintained
    From $4.99 per use
19. #46P

    Phonely

    Builds voice agents that answer and handle business calls across phone, chat, SMS, and API.

    594
    Active
    From $50/mo
    2023
20. #47T

    TrackPodcastsMCP · open

    Transcribes podcast audio to find which brands sponsor which shows, with verbatim ad reads and promo codes.

    592
    Active
    From $30/mo
    2024
21. #49A

    AI Notebook

    Transcribes audio, meetings, and documents into searchable notes with summaries and action items.

    445
    Active
    From $6.66/mo
22. #53W

    WhisperTranscribe.ai -

    Transcribes audio and video files to text in 134 languages with speaker identification and subtitle generation.

    340
    Active
    From $9.99/mo
23. #54U

    User IntuitionMCP · sign-in

    Runs AI-moderated voice, video or chat interviews with vetted panelists and turns the recordings into traceable findings.

    331
    Active
    From $30 per use
    2025
24. #56I

    IllyVoIP V2

    Provides business calling, phone numbers, SIP trunks, and SMS messaging for teams and carriers.

    305
    Active
    Pay per use
    2006
25. #58A

    Amernet AI Receptionist

    Answers incoming calls with conversational AI, books appointments, and routes messages across voice, email, and chat channels.

    231
    Active
    From $14.99/user/mo
26. #65K

    KallyAI

    Delegates calls, emails, research tasks and scheduling to an AI assistant that executes and reports back.

    143
    Active
    From $19/mo
    2025
27. #72S

    StrikeScribe AI

    Transcribes audio and video files to searchable text with AI-generated summaries, action items, and insights.

    128
    Active
    From $9/mo
    2021
28. #77B

    byVoice

    AI voice agents answer calls, handle appointments, and conduct outbound campaigns 24/7.

    102
    Active
    From $29/mo
29. #79W

    Whisper STT

    Transcribes and translates audio files in 99 languages using OpenAI Whisper, with optional browser-based offline processing.

    82
    Active
30. #81P

    ParseAPIMCP · sign-in

    Checks email addresses and phone numbers, resolves postal codes, and geolocates IPs, returning structured JSON responses via a single API key.

    73
    Active
    From $20/mo
31. #83M

    MobileValidateMCP · sign-in

    Checks whether phone numbers and email addresses are registered on messaging, social and consumer apps, plus line type and carrier, via one API.

    66
    Active
    From $0.00 per use
32. #87R

    Roark

    Scores and tests voice AI agents on 500 audio metrics before and after production deployment.

    48
    Active
    From $0.15 per use
    2024
33. #89S

    ScriptivoxMCP · sign-in

    Transcribes audio and video files into text, supporting 100 languages with real-time streaming and batch processing.

    46
    Active
    From $10/mo
    2024
34. #91S

    SRIFTMCP · open

    Streams files, chat and audio calls directly between browsers or AI agents over encrypted peer-to-peer links, with no server storage.

    43
    Active
35. #96A

    AudexumMCP · sign-in

    Turns speech into clean, punctuated text typed at the cursor in any app, and reads text aloud in chosen voices.

    35
    Active
    From ≈ $13/mo
36. #97U

    UcodeMCP · open

    Rents disposable phone numbers in 180 countries and delivers the SMS verification codes they receive.

    28
    Active
    From ≈ $4.01 once
37. #98Q

    QuickVoice

    Handles incoming business calls with AI agents that answer questions, capture details, and route to staff.

    27
    Active
    Pay per use
38. #100L

    Lexycall

    Handles incoming calls with voice AI to schedule appointments, answer questions, and capture orders without human staff.

    25
    Active
    Contact sales
39. #108T

    Talvin AI

    Conducts structured voice interviews with candidates, scores them against job criteria, and completes reference checks automatically.

    13
    Active
    From $175/mo
40. #110P

    PhoneFlow

    Answers calls 24/7, books appointments, and routes inquiries using AI voice.

    13
    Active
    From $0.25 per use
41. #112H

    Hyperparam

    Captures AI model calls and searches logs to analyze token spend, prompt performance, and team usage patterns.

    12
    Active
    Free plan
42. #113A

    AI Phone 360

    AI receptionist answers calls, qualifies leads, books appointments, and sends summaries via text.

    12
    Active
    From $19.99/mo
43. #116M

    MedPhone

    Answers inbound calls, books appointments, and handles refills directly into athenahealth.

    12
    Active
    From $150/mo
    2025
44. #118C

    Composed ChaosMCP · sign-in

    Answers missed calls and emails for contractors and local businesses, qualifies each inquiry and sends instant email or SMS alerts.

    12
45. #119O

    OnCrew

    Answers phone calls for HVAC, plumbing, and electrical contractors, captures job details, and alerts on-call technicians to urgent requests.

    11
    Active
    From $49/mo
    2026
46. #120P

    Privocio

    Transcribes speech to text via API or self-hosted deployment, stripping filler words and silence to cut tokens before they reach an LLM.

    11
    Active
    From $19/mo
    2026
47. #121H

    Humanlike AIMCP · sign-in

    Runs voice screening interviews with job candidates, generates questions from job postings, and scores each candidate's answers.

    11
    Active
48. #123K

    Kastra

    Evaluates attribute-based policies on prompts, tool calls, and agent actions in under one millisecond, returning allow, deny, redact, or hold decisions.

    10
    Active
    From $19.99/user/mo
    2024