Dograh
An open-source, self-hostable platform for building voice AI agents — a free alternative to Vapi or Retell, with a visual drag-and-drop builder for phone call flows.
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Description
If you've ever wanted a phone line answered by an AI that actually sounds natural, you've probably run into tools like Vapi or Retell — powerful, but closed and billed per minute with no way to run them yourself. Dograh does the same job (building AI agents that make and receive phone calls) but as free, open-source software you can host on your own servers, similar to how Mattermost gives you Slack's chat experience without the recurring bill.
Under the hood, Dograh gives developers a visual workflow builder for assembling voice agents from modular blocks, with support for inbound and outbound calls through Twilio, Vonage, Telnyx, or Plivo. You can mix and match your own speech-to-text, LLM, and text-to-speech providers, or route straight through a speech-to-speech model like Gemini's Flash Live for lower latency. It ships with Python and Node.js SDKs, browser-based testing, and native MCP (Model Context Protocol) support, and is released under the permissive BSD 2-Clause license with over 5,500 GitHub stars.
💬 Our review
The short version: if your team has the engineering capacity to self-host, Dograh gives you the core of Vapi or Retell — visual voice-agent building, multi-provider flexibility, telephony integrations — without the per-minute markup or vendor lock-in, which is a genuinely rare combination in this space.
Compared to Vapi and Retell, the trade-off is operational: those platforms hand you a managed, always-on service with support SLAs, while Dograh hands you the source code and expects you to run infrastructure (or pay Dograh's own managed cloud at roughly 1 cent/minute, which is competitive but adds vendor dependency back in if you choose it). The project is young — no public founding date, an active but still-forming community around 1.3k forks — so expect some rough edges compared to battle-tested commercial platforms. For a startup or dev team comfortable self-hosting and wanting full control over voice-agent costs and data, Dograh is a strong pick; teams that just want a phone number that works today without any DevOps should stick with Vapi or Retell.
💰 Pricing
📊 Global score
🤖 AI-enriched data
100% gratuit et open-source en self-hosted (licence BSD 2-Clause). Cloud managé optionnel : pay-as-you-go à 1 centime/minute (10 appels simultanés inclus, crédits à partir de 5$), tarif volume, ou entreprise sur devis.
Pros
100% open-source (BSD 2-Clause) — auditable et modifiable librement
Constructeur visuel de workflows pour agents vocaux, sans code lourd
Liberté totale de choix des fournisseurs STT/LLM/TTS, y compris speech-to-speech
Support MCP natif et SDKs Python/Node.js
Reconnu #1 Produit du jour sur Product Hunt
Cons
Self-hosting exige des compétences DevOps réelles (infra, mise à l'échelle, monitoring)
Communauté jeune comparée à des acteurs établis comme Twilio
Le cloud managé reste optionnel mais réintroduit une dépendance si utilisé
Documentation encore en construction sur certains connecteurs télécom