Phonic
Also known as: phonic.ai, phonic.co
Speech to speech voice agent platform on Phonic's own audio models: developers build agents with webhook, WebSocket and MCP tools, run them on phone numbers, SIP trunks, LiveKit or apps, hand off between agents, and score calls with eval prompts and replays. SOC 2 Type II, SSO, self host on Enterprise; usage pricing from $0.14 a minute.
Phonic sells a speech to speech voice agent platform built on its own audio foundation models, which hear tone and hesitation and reply in roughly 750 milliseconds. Developers build an agent from a prompt, a voice and tools (webhook and WebSocket tools on their own endpoints, MCP servers, context tools with reference text, transfer tools to a person or to another Phonic agent), then run it on Phonic or custom phone numbers over SIP trunks and Amazon Connect, in web and mobile apps over WebSockets, or through LiveKit, and place outbound calls through the API.
Every conversation is recorded with transcripts, tool calls and their request and response bodies, audio and latencies, and is sent to the customer's systems by webhook. Eval prompts score conversations against pass or fail criteria, extraction schemas measure outcomes, and a replay endpoint re runs recorded calls to test a prompt change. A REST API with OpenAPI and AsyncAPI files, TypeScript and Python SDKs, a CLI and an MCP server cover agents, tools, conversations and workspaces.
Phonic reports SOC 2 Type II certification, offers SSO through SAML or OIDC, member roles, audit logs and a HIPAA BAA, and deploys as a multi region cloud, a single tenant instance or self hosted, with on premises and VPC deployment on Enterprise. Pricing is published. A free Starter plan comes with monthly credits at $0.14 a minute, Pro is $240 a month and $0.12 a minute, and Enterprise terms are custom. Phonic Inc. was founded by Moin Nadeem and Nikhil Murthy and is backed by Lux Capital, First Round Capital and Felicis.
Vendor details
Canonical URL
https://phonic.ai
Category
Voice agent
Funding status
Backed by Lux Capital, First Round Capital and Felicis, with angels including Clement Delangue, Amjad Masad and Naval Ravikant (company About page); round sizes not stated
Company status
independent
Use cases & customers
Primary use cases
Target customers
Deployment options
Integrations
Webhook and WebSocket tools on the customer's endpoints, MCP servers as tools, 1,000+ no code integrations, post call webhooks (conversation ended, analysis, transferred), SIP trunks (Twilio, Telnyx), Amazon Connect and LiveKit; REST API with OpenAPI and AsyncAPI, TypeScript and Python SDKs, CLI and MCP server.
In practice
A recruiting team screens hundreds of applicants by phone. A Phonic agent answers on the team's own number over a SIP trunk, runs the screen, fetches and updates candidate data through webhook tools, and transfers a strong candidate to a recruiter.
A support line routes callers by plan. Transfer tools hand enterprise and starter callers to different Phonic agents, and the customer's own system sets each call's agent at runtime through the agent configuration endpoint.
A team changes a prompt and needs to know nothing broke. It replays recorded calls through the replay endpoint and scores them with eval prompts against pass or fail criteria before validating the change live.
Sources & related URLs
Agentic Index coverage score
9.0 / 14 capabilities · 64%
| Integrations & Tool Calling | Full |
|---|---|
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Agents call custom webhook and WebSocket tools the customer defines, consume MCP servers as tools, and transfer calls, with tools managed through the API. The site lists 1,000+ no code integrations beside webhooks for triggering outside workflows during or after a call. SourcePhonic, docs.phonic.ai Tools pages and phonic.ai homepageread 2026-09-28 |
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| Workflow Orchestration | Full |
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Transfer tools hand a conversation to another Phonic agent (for example routing enterprise and starter callers to different agents) or to a phone number, tools run synchronously or asynchronously, and an agent configuration endpoint lets the customer's own system set each call's agent at runtime. SourcePhonic, docs.phonic.ai Transfer Tools, How Tools Execute and Agent Configuration Endpoint pagesread 2026-09-28 |
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| Knowledge Grounding & RAG | Partial |
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Context tools inject a fixed block of reference material (up to 64,000 characters) into a conversation when the agent calls them, and webhook tools can fetch data from the customer's systems. There is no knowledge base, index or retrieval over the customer's documents. SourcePhonic, docs.phonic.ai Context Tools pageread 2026-09-28 |
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| Human Oversight & Guardrails | Partial |
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Transfer tools hand calls to a human, a queue or another system, with a conversation.transferred webhook, and the customer decides which tools an agent may use. There is no step where a person approves an agent action before it commits. SourcePhonic, docs.phonic.ai Transfer Tools and Webhooks pagesread 2026-09-28 |
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| Security, Identity & Governance | Full |
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Access runs through SSO with SAML or OIDC, JWTs from the customer's own identity system, member role assignments and admin scoped API keys, with audit logs of identity, configuration and data handling actions. Phonic reports SOC 2 Type II certification and offers a HIPAA BAA, with a trust center at trust.phonic.co. SourcePhonic, phonic.ai homepage and docs.phonic.ai Authentication and Audit Logs pagesread 2026-09-28 |
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| Observability & Auditability | Full |
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Each conversation record holds the live and post call transcripts, turn items, every tool call with its request and response bodies, the audio, turn latencies and the model used, retrievable through the API and sent by webhook, and separate audit logs cover workspace changes for a year by default. SourcePhonic, docs.phonic.ai Conversations API and Audit Logs pagesread 2026-09-28 |
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| Memory & State Persistence | Not documented |
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Nothing the agent learns persists across conversations. Context tools supply fixed text for each call, and caller context comes from the customer's own systems through the agent configuration endpoint or webhook tools. The conversation records are logs, not memory the agent reads. SourcePhonic, docs.phonic.ai Context Tools and Agent Configuration Endpoint pagesread 2026-09-28 |
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| Deployment & Data Residency | Full |
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Phonic runs as a multi region cloud, as a single tenant deployment, or self hosted, with on premises and VPC deployment listed on the Enterprise plan. SourcePhonic, phonic.ai homepage and pricing pageread 2026-09-28 |
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| Prebuilt Agents, Templates & Packs | Not documented |
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Phonic is a platform for building agents from a prompt, voice and tools. Its build guides and prompting guide come with no agent templates or prebuilt agents, and the use case pages (recruiting, healthcare, logistics, support) describe applications, not packaged agents. SourcePhonic, docs.phonic.ai llms.txt and phonic.ai use case pagesread 2026-09-28 |
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| Triggers & Channel Coverage | Full |
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Agents answer inbound calls on Phonic or custom numbers over SIP trunks (Twilio, Telnyx) and Amazon Connect, place outbound calls through the API, and run in web and mobile apps over WebSockets or LiveKit, so callers and the customer's systems start conversations without a person at the customer's end. SourcePhonic, docs.phonic.ai Phone Numbers and Conversations API pagesread 2026-09-28 |
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| Model Flexibility & Routing | Not documented |
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Agents run on Phonic's own speech to speech models at one price per minute with no LLM pass throughs. There is no third party or bring your own model option, so any choice is among Phonic's own models. SourcePhonic, phonic.ai pricing page and docs.phonic.airead 2026-09-28 |
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| APIs, SDKs & MCP Extensibility | Full |
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A REST API with published OpenAPI and AsyncAPI files covers agents, tools, conversations, evaluations, extraction schemas, voices, projects, workspaces and API keys, with TypeScript and Python SDKs, a CLI and an MCP server, on API key, session token or JWT auth. SourcePhonic, docs.phonic.ai API reference and installation pagesread 2026-09-28 |
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| Testing, Debugging & Optimization | Full |
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Eval prompts score each conversation against binary, observable criteria with pass or fail results through the API, extraction schemas measure outcomes at scale, and a replay endpoint re runs a recorded turn or whole call to test a prompt change before it is validated live. SourcePhonic, docs.phonic.ai Evals Guide and Replaying Conversations pagesread 2026-09-28 |
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| Browser & Computer Use | Not documented |
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Agents act through webhook, WebSocket, MCP, context, transfer and built in tools, and there is no browser, desktop or computer control. SourcePhonic, docs.phonic.ai Tools pagesread 2026-09-28 |
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The Agentic Index coverage score grades every vendor Full, Partial or Not documented against the same 14 buyer facing capabilities, from public evidence only. Each capability links to how all vendors in the index score on it. How this evidence is graded
Product updates
Phonic-1 is Phonic's own speech to speech model for voice agents, available to customers now. It can call tools and act while the caller is still talking, so the answer is ready when they stop instead of after a pause. It is trained on more than 50 languages and can switch language mid conversation while keeping the same voice.
Bears on: MCP / tool calling / API
View sourcePhonic's Python SDK v0.32.39 and TypeScript SDK 0.32.33 add web_search to the built in tools a voice agent can be given, alongside keypad input and natural conversation ending. The builder can choose whether the agent speaks before it runs a search mid call.
Bears on: MCP / tool calling / API
View sourcePricing
$0.14/min on Starter ($0/mo with $30 monthly credits); Pro $240/mo at $0.12/min
per conversation minute
What is public
Full plan pricing: Starter $0 a month with $30 of monthly credits at $0.14 a minute, Pro $240 a month with $240 of credits at $0.12 a minute, Enterprise custom; seat, agent and concurrency limits per plan.
Variable cost rationale
Billed per conversation minute on every plan, so cost scales with call minutes beyond the included credits.
Sales call required
Mixed (some tiers require a call)
Free / trial
Starter: $0/mo with $30 of monthly credits
Lowest paid plan
Pro, $240/month (includes $240 of credits, $0.12/min)
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Alternatives to Phonic
The closest documented capability profiles to Phonic among voice agents tracked by Agentic Index, ordered by similarity on the same 14 point evidence the rankings use. No vendor pays for placement.
- Autocalls10.5 / 14Adds documented Prebuilt Agents, Templates & Packs and Model Flexibility & Routing
- Liberate7.5 / 14Adds documented Prebuilt Agents, Templates & Packs
- Phonely11.5 / 14Adds documented Memory & State Persistence and Prebuilt Agents, Templates & Packs, among others
- Salient9.5 / 14Adds documented Memory & State Persistence and Prebuilt Agents, Templates & Packs
- Vapi11.5 / 14Adds documented Memory & State Persistence and Prebuilt Agents, Templates & Packs, among others
- Aircall11.0 / 14Adds documented Memory & State Persistence and Prebuilt Agents, Templates & Packs, among others
Similarity is computed from each vendor's Agentic Index coverage score evidence, axis by axis, not from the totals. How this evidence is graded