We have standardized on Cartesia as our text-to-speech provider and retired Rime from the platform. All assistants using Rime voices have been automatically migrated to their closest Cartesia equivalents.
- Cartesia delivers faster time to first audio, more natural speech, better pronunciation accuracy, and broader language and accent coverage
- Every Rime voice was automatically mapped to its nearest Cartesia match, preserving gender and matching accent and language as closely as possible
- Migration was non-destructive and zero-downtime: prompts, tools, and phone routing remain unchanged, and no reconfiguration is required
- Your assistant will sound different (and by our measurements, better): open Voice settings to preview and adjust your voice selection if needed
Any MCP agent (Claude, Grok, Hermes, OpenClaw and others) can now use your Assistable account as its phone, set up in three steps with no API key to copy.
- Add
https://api.assistable.ai/mcpto your agent, ask it to connect to Assistable, and approve the code it shows you - No account yet? Your agent can open one with an emailed code; adding a card gets you a local number
- Your agent can talk on calls itself in a voice it picks, and press keys to get through phone menus
- Hand a call to an Assistable assistant with a task, like booking a table, and read the result when it ends
- Send a number’s calls to your agent, with voicemail when it is not listening
- Text from your A2P-approved numbers and read replies
- Agent calls and texts are logged in HighLevel when the account is connected
- Manage or disconnect agents under Integrations → Personal agent
You can now power your voice assistants with OpenAI GPT Live, a speech-to-speech model that listens and speaks in one step for faster, more natural conversations.
- 22 GPT Live voices available, including Alloy, Ash, Ballad, Cedar, Coral, Marin, Sage, Shimmer, and Verse
- Preview any voice in the Voice library before switching
- Select a separate Chat & tools model to handle tool actions (bookings, lookups, transfers) and chat replies while using a GPT Live voice
- Switching to or from a GPT Live voice requires a full Publish
- GPT Live voices cannot be used with a connected Flow
- Transcription and voice-tuning settings do not apply, as GPT Live handles hearing and speaking directly
Assistable now supports Cartesia as a voice provider, adding 773 natural-sounding voices across more than 50 languages.
- Choose Cartesia voices when configuring any assistant
- Audition voices before saving to hear the exact output quality
- Tune Voice Speed and Expressive Mode for every Cartesia voice
- Existing assistants and voices remain unchanged
Starting September 11, 2026, text-to-speech usage will be billed and tracked separately from voice orchestration usage.
- Configure TTS rebilling separately for each sub-account with fixed rates or percentage markups
- Rebill TTS independently from orchestration charges
- View TTS charges itemized separately in billing records and transaction logs
- No action required before September 11, but review your sub-account billing settings after the release to ensure your TTS pricing and margins are configured correctly
Assistable now connects to 8,000+ apps through Zapier. No code, no webhooks to babysit.
- 5 triggers including New Call with status and sentiment filters, and New Monitor Alert
- 13 actions including Place AI Voice Call, Generate AI Reply, and Add to Knowledge Base
- 4 searches including Find-or-Create Contact and Get Call by ID with full transcript
- Connects with a v3 API key in about a minute
- Invite-only beta: Add Assistable to your Zapier account
- Found a rough edge? Tell us in Discord #get-help and we will ship the fix
The voice pipeline is now multi-provider: five new text-to-speech engines, six new speech-to-text models, and noise suppression, all in a redesigned Voice Studio.
- Five new TTS providers: Amazon Polly, Microsoft Azure, Inworld (Mini/Max), Resemble (Turbo/Rapid), plus expanded Rime models (Coda, Natural, Natural HD, Arcana v3, Kokoro) and MiniMax speech-2.8-turbo and speech-2.5-hd.
- Six new transcription engines: Deepgram Flux (new recommended default with fine-grained end-of-turn controls), Deepgram Nova-3 (80+ languages, Smart Format, Keyterm Boost), Deepgram Nova-2, AssemblyAI Universal-Streaming, Azure Fast.
- Noise suppression: Krisp (recommended) or DeepFilterNet with adjustable attenuation, cleaning up caller audio from cars, cafés, and job sites before it reaches transcription.
- Redesigned Voice Studio: Voice Settings panel (provider/model selection, voice tuning, transcription, noise suppression, interruption controls, auto-save with Publish workflow), Voice Library (instant search, filters, Recommended/Favorites tabs, one-click previews, community voting), Compare dock (shortlist up to 8 voices, back-to-back playback with adjustable speed, one-click apply), My Voices (import, clone, duplicate by ID).
- Expressive Mode: context-aware emotion and Language Boost across 11 languages for supported providers.
- ElevenLabs fine-tuning: Stability, Similarity Boost, Style, Speaker Boost controls for Eleven v2, Flash v2/v2.5, Turbo v2/v2.5, Multilingual v2.
The Chat Widget now supports live voice conversations alongside text chat. Visitors can switch between typing and speaking mid-conversation, with the assistant maintaining full context across both modes.
- Chat | Voice toggle, one-tap switch between text and voice, with seamless context handoff when switching mid-conversation
- Unified knowledge base, voice answers from the same knowledge base as chat, with context-aware follow-ups and multi-angle search
- Action cards, interactive cards for products, orders, tickets, bookings, and feedback instead of text-only responses
- Human handoff, three modes (support, transparent, disabled) with live-agent indicators and office hours
- Home tabs, lobby with action cards, news feed, roadmap, and live knowledge base search
- Pre-chat forms, optional name/email/phone collection before conversation starts
Assistable’s billing is now fully documented in a comprehensive guide covering every charge type, rebilling mechanics, and real pricing examples.
- Complete breakdown of voice call pricing (voice engine, LLM, telephony, short-call surcharge) with per-second billing math
- Chat message, knowledge base, observation/QA, and phone number pricing explained with worked examples
- Full rebilling guide for agencies: how to set fixed prices vs. percentage markups, what clients see, and profit calculation examples
- Transaction receipt anatomy and FAQ covering common billing questions
Build on Assistable programmatically. The v3 REST API ships with scoped API
keys, predictable rate limits, and a full interactive
API Reference — plus official tooling for every workflow:
- TypeScript SDK —
npm install @assistableai/sdk. Typed operation functions for every v3 endpoint. - Python SDK —
pip install assistableai. Typed models with sync and async variants. - MCP server —
@assistableai/mcpexposes every v3 operation as a tool for Claude Desktop, Cursor, and other MCP clients. - CLI —
@assistableai/cliputs every v3 operation in your terminal and CI scripts. - Export & Test — download the OpenAPI spec or a ready-to-run Postman collection and start sending requests in seconds.
The official Assistable Discord is live — join here.
- #ask-ai — an AI support assistant that answers from these docs, with cited sources.
- #get-help — a support forum where the assistant posts a first response on every thread and routes bugs straight to the team.
- #announcements and #status — release news and platform status; hit Follow to mirror either channel into your own server.