Best Twilio Programmable Voice alternatives
Programmable voice API with integrated speech recognition and text-to-speech.
Last updated November 12, 2026
Top Twilio Programmable Voice alternatives on usedby: AssemblyAI, Deepgram, and Recall.ai. Twilio Programmable Voice has 1 public customer on usedby. 6 other tools of the same or a competing category, from other vendors, have public customers.Latest check Nov 12, 2026: 259 of 265 public lines checked. Every public proof counts as a customer, from case studies to job posts. The proof level stays visible: confirmed (a case study, a press release), observed (the vendor’s customer page), signal (a job post, the weakest proof).
Ranked by public customers
Tools of the same or a competing category, from another vendor. Open a row for its customers, sources and facts; shared customers never set the order.
1
AssemblyAISpeech-to-text API for accurate audio and video transcription64customers64 customers: 21 confirmed, 40 observed.
Customers include Zoom, CallRail, and GrottoAI.
Largest industry on usedby: Artificial Intelligence, 21 customers.
No company is listed on both AssemblyAI and Twilio Programmable Voice yet.
Free trial or free plan available. Source
Source: assemblyai.com, latest capture Nov 11, 2026.
2
DeepgramSpeech-to-text API with industry-leading accuracy51customers51 customers: 26 confirmed, 19 observed.
Customers include Five9, Flowtica, and GetVocal AI.
Largest industry on usedby: Artificial Intelligence, 20 customers.
1 company is listed on both Deepgram and Twilio Programmable Voice.
Free trial or free plan available. Source
Source: deepgram.com, latest capture Nov 11, 2026.
We made a strategic decision not to invest in building our own transcription engine so that we could leverage the innovation and investments being made by other companies
Adam Larsen, chief technical officer at Creovai, Creovai. Source 3
Recall.aiAPI for meeting bots and transcription51customers51 customers: 25 confirmed, 24 observed.
Customers include HubSpot, Apollo.io, and ClickUp.
Largest industry on usedby: Sales Tech & CRM, 18 customers.
No company is listed on both Recall.ai and Twilio Programmable Voice yet.
Free trial or free plan available. Source
Source: recall.ai, latest capture Nov 8, 2026.
We found the Recall.ai team to be an extremely friendly bunch of driven folks who really care about the criticality of their service. I highly recommend using Recall.ai
Soumyarka Mondal, co-founder and Chief Technical Officer, Sybill. Source 4
CartesiaRealtime voice AI models (Sonic TTS, Ink STT) and managed voice agents built on state space models.43customers43 customers: 34 confirmed, 5 observed.
Customers include ServiceNow, Quora, and Cresta.
Largest industry on usedby: Artificial Intelligence, 25 customers.
No company is listed on both Cartesia and Twilio Programmable Voice yet.
Pricing: free plan and paid tiers. Source Free trial or free plan available. Source
Source: cartesia.ai, latest capture Nov 11, 2026.
Enterprise buyers are done tolerating robotic-sounding AI on their sales calls. The bar is moving fast, and having Cartesia as our default voice infrastructure means we’re always ahead of it.
Torrey Leonard, CEO, Thoughtly, Thoughtly. Source 5
LiveKitOpen-source framework and cloud platform for building and running voice, video and physical AI agents.37customers37 customers: 3 confirmed, 31 observed.
Customers include Assort Health, Playback, and Polymath.
Largest industry on usedby: Artificial Intelligence, 10 customers.
No company is listed on both LiveKit and Twilio Programmable Voice yet.
Pricing: free plan and paid tiers. Source Free trial or free plan available. Source
Latest capture across its sources: Nov 11, 2026.
Voice makes AI feel less like a tool and more like a natural part of the experience. LiveKit gives us the scalable foundation to bring those voice experiences to life at enterprise scale, without sacrificing flexibility.
Jonathan von Rüeden, Chief AI Officer of SAP SE, SAP. Source 6
Fish Audio18customers18 customers: 0 confirmed, 17 observed.
Customers include Runway, ACE STUDIO, and Clout Kitchen.
Largest industry on usedby: Artificial Intelligence, 5 customers.
No company is listed on both Fish Audio and Twilio Programmable Voice yet.
Latest capture across its sources: Nov 12, 2026.
AssemblyAI was very helpful about working with us to do experiments to compare both the Word Error Rate and the overall timing accuracy. That, combined with a better price point, were big reasons why we switched.Twilio Programmable Voice and its top alternatives, side by side
Public customers at every proof level, and what each vendor states on its own pages. “Not checked yet” means usedby has no verified value; the vendor may publish it.
| Tool | Customers | Largest industry | Pricing | Free trial | Security |
|---|---|---|---|---|---|
| Twilio Programmable Voice | 1 | No clear lead | Not checked yet | Not checked yet | Not checked yet |
| AssemblyAI | 64 | Artificial Intelligence | Not checked yet | Yes Source | SOC 2 Type II Source |
| Deepgram | 51 | Artificial Intelligence | Not checked yet | Yes Source | SOC 2 Type II Source |
| Recall.ai | 51 | Sales Tech & CRM | Not checked yet | Yes Source | SOC 2 Type II, ISO 27001 Source |
| Cartesia | 43 | Artificial Intelligence | free plan and paid tiers Source | Yes Source | SOC 2 Type II, PCI DSS Source |
| LiveKit | 37 | Artificial Intelligence | free plan and paid tiers Source | Yes Source | SOC 2 Type II Source |
Best Twilio Programmable Voice alternative by industry
In the industries where Twilio Programmable Voice has the most customers, the alternative with the most customers of its own there (at least three).
- Artificial IntelligenceCartesia25 customersTwilio Programmable Voice: 1
Questions about Twilio Programmable Voice alternatives
What are the best Twilio Programmable Voice alternatives?
Ranked by their public customers on usedby: AssemblyAI (64 customers), Deepgram (51 customers), and Recall.ai (51 customers). See who uses AssemblyAI.
Which Twilio Programmable Voice alternatives offer a free trial?
AssemblyAI, Deepgram, and Recall.ai offer a free trial or a free plan, according to their own pricing pages.
What is the best Twilio Programmable Voice alternative for Artificial Intelligence companies?
Cartesia, with 25 customers in Artificial Intelligence on usedby. Twilio Programmable Voice has 1 there. Artificial Intelligence companies on usedby.
Do Twilio Programmable Voice customers use other tools too?
1 of the 1 Twilio Programmable Voice customer on usedby also uses another tool on this list. Deepgram shares the most: 1.
How does usedby rank Twilio Programmable Voice alternatives?
Only tools of the same or a competing category, from another vendor, count. They are ranked by their public customers at every proof level, job posts included; a tie goes to the stronger proofs (more confirmed, then more observed). Each tool shows its mix: confirmed (a case study, a press release), observed (the vendor’s customer page), signal (a job post, the weakest proof). Shared customers are shown for information and never set the order. Tools of other categories that the same companies use are listed apart, as tools used with Twilio Programmable Voice. usedby does not publish departures, so no company is shown switching from Twilio Programmable Voice to another tool.