Shortlist by what you need
Start here if you know why you are leaving Vapi.
Want the closest match?
CartesiaMost similar to Vapi in what it does, its category and its price.
Visit (opens Cartesia in a new tab)Need a free plan?
DeepgramHas a free plan, rated 4.5 out of 5. Vapi has none.
Visit (opens Deepgram in a new tab)Want the lowest price?
SpeechmaticsFrom $0.13/mo, the lowest starting price here.
Visit (opens Speechmatics in a new tab)Want the best rated?
AssemblyAIRated 4.5 out of 5 in our review, against 4.4 for Vapi.
Visit (opens AssemblyAI in a new tab)
At a glance
Green means better than Vapi, red means worse. Prices are starting prices per month.
| Tool | Our rating | Starts at | Free plan | Best for | Compare |
|---|---|---|---|---|---|
 VapiBaseline | 4.4 | Not listed | No | Infrastructure for building voice agents, not a voice model itself | |
| Cartesia | 4.4Same | Free | YesVapi has none | A different model architecture built for real-time voice agents | vs Vapi |
| Deepgram | 4.5+0.1 | Free | YesVapi has none | Trains its own speech models from scratch, built for call centers | vs Vapi |
| AssemblyAI | 4.5+0.1 | Free | YesVapi has none | A developer API, not an app, built for accuracy benchmarks | vs Vapi |
 SpeechIntellect | 3.4−1.0 | Not listed | No | AI reads the emotional tone in speech, not just the words - real-time STT that captures tonality alongside transcription, and TTS that synthesizes voice with intonation matched to age, gender and emotional context. | vs Vapi |
| Speechmatics | 3.9−0.5 | $0.13/mo | YesVapi has none | Enterprise speech API platform for speech-to-text and voice agents in 55+ languages, with $100 in free usage and no card required. | vs Vapi |
 Gladia | 4.3−0.1 | Free | YesVapi has none | A European speech API tuned for accents and multilingual audio | vs Vapi |
 Voicemaker | 4.1−0.3 | $5/mo | YesVapi has none | One simple interface over several cloud providers' TTS voices | vs Vapi |
 Hume AI | 4.2−0.2 | Free | YesVapi has none | Built around reading and responding to vocal emotion | vs Vapi |
The alternatives in detail
In order of how closely each one matches Vapi.
Cartesia
4.4Free
vs VapiSameFree plan
A different model architecture built for real-time voice agents.
- State space model architecture (Mamba-based) for low latency
- Sonic (TTS), Ink (STT), and Line (voice agent) product suite
- Top-ranked on independent speech benchmarks
Architecture specifically optimized for real-time latency
No published flat pricing, requires contacting sales for production use
Deepgram
4.5Free
vs Vapi+0.1Free plan
Trains its own speech models from scratch, built for call centers.
- Speech recognition models trained from scratch, not fine-tuned Whisper
- Real-time streaming transcription API
- Built for call center and voice agent use cases
Own model training gives more control over accuracy and speed tradeoffs
No consumer app, requires engineering integration
AssemblyAI
4.5Free
vs Vapi+0.1Free plan
A developer API, not an app, built for accuracy benchmarks.
- Usage-based speech-to-text API
- LeMUR framework for LLM analysis on transcripts
- Published accuracy benchmarks against competitors
Strong, independently referenced accuracy benchmarks
No consumer app, requires development work to use
SpeechIntellect
3.4Not listed
vs Vapi−1.0
AI reads the emotional tone in speech, not just the words - real-time STT that captures tonality alongside transcription, and TTS that synthesizes voice with intonation matched to age, gender and emotional context.
- Real-time STT with emotional tone and semantic meaning analysis
- TTS with intonation matched to age, gender, and emotional context
- Combined voice-driven workflow automation
Emotional tone detection alongside transcription is a genuinely differentiated capability
No published pricing - requires visiting a separate page
Speechmatics
3.9$0.13/mo
vs Vapi−0.5Free plan
Enterprise speech API platform for speech-to-text and voice agents in 55+ languages, with $100 in free usage and no card required.
- Speech-to-text in 55+ languages and dialects
- Low-latency mode built for real-time voice agents
- English text-to-speech for voice-agent responses
A meaningful free credit to test the API before paying
Enterprise pricing is not public and needs a sales conversation
Gladia
4.3Free
vs Vapi−0.1Free plan
A European speech API tuned for accents and multilingual audio.
- Whisper-based model with additional accuracy tuning
- Strong performance on accented and multilingual audio
- EU-based infrastructure for data residency needs
Tuned specifically for accented and code-switching speech
No consumer app, requires development work to use
Voicemaker
4.1$5/mo
vs Vapi−0.3Free plan
One simple interface over several cloud providers' TTS voices.
- Aggregates TTS voices from Amazon, Google, and Microsoft
- Single interface and billing for multiple cloud voice providers
- Wide language and accent coverage
Low, accessible pricing compared to proprietary neural voice platforms
Voice realism trails dedicated neural voice-cloning platforms
Hume AI
4.2Free
vs Vapi−0.2Free plan
Built around reading and responding to vocal emotion.
- Empathic Voice Interface for emotion-aware responses
- Vocal tone and prosody analysis
- Research-backed emotional expression measurement
Genuinely distinct focus on emotional intelligence, not just accuracy
Narrower use case than general-purpose voice AI platforms
FAQ
Questions people ask
Is Vapi free?
Vapi does not list a free plan. Check its pricing page for current plans.
What is the best free alternative to Vapi?
Deepgram is the highest-rated alternative here with a free plan (4.5 out of 5). Other free options: AssemblyAI, Cartesia, Gladia.
What is the cheapest alternative to Vapi?
Among paid plans, Speechmatics has the lowest starting price (from $0.13/mo). If you need it free, start with Deepgram.
How did you pick these alternatives?
We match tools on what they do, their category and their price, using the details in our directory. Ratings come from our reviews and reader reviews.