Zavu Inbox
- Android app
- Not listed
- Free plan
- Yes
- Paid plans from
- $20/mo
- Runs on
- api, Web
Summary
Zavu Inbox is an open-source messaging API for sending and receiving communications across channels, with web access. Its inbox organizes threads by recent activity and brings together messages from the channels used in each thread. Supported channels include WhatsApp, SMS, one-way SMS, voice, email, Telegram, Instagram, and Messenger. Zavu can select a channel automatically based on the recipient and the sender’s configured channels. AI agents can respond across messaging channels and phone, use agent-specific knowledge bases and memory, and call tools owned by the customer. The maker lists SDKs for TypeScript, Python, Ruby, Go, and PHP, along with an MCP server, agent skills, a CLI, an n8n node, and a Vercel Marketplace integration. The free plan is 0.00 USD per free, billed free forever, with two connections, 2,000 shared monthly messages across WhatsApp, Telegram, Instagram, and Messenger, and $2 usage credit. The Pro plan is 20.00 USD per month and includes $20 monthly usage credit, unlimited channel connections, and prepaid usage. Sending is rejected when the prepaid balance reaches zero, while inbound messages and webhooks continue. Voice agents start at $0.07 per minute; premium models and voices cost extra, and BYOK is unavailable for voice agents.
Who it is for
Zavu Inbox suits developers or teams building multi-channel messaging and AI-agent workflows. Its free plan has limited connections and shared monthly message capacity.
What is good
- Supports messaging across eight listed channels.
- Automatically selects a channel based on recipient and configuration.
- Agents can use knowledge, memory, and customer-owned tools.
- Lists SDKs for five programming languages.
What to know first
- Free plan limits users to two channel connections.
- Free plan shares 2,000 monthly messages across four channels.
- Sending stops when prepaid balance reaches zero.
- Voice agents start at $0.07 per minute.
Verdict
Zavu Inbox brings multi-channel threads, routing, and agent tools into a messaging API. Check the free-tier message limit and prepaid behavior, and account for separate voice-agent charges if relevant.
Zavu Inbox plans and pricing
All plansCompared on shared inbox software
Facts
- Product
- Zavu describes itself as a unified messaging API for sending and receiving communications across channels.zavu.dev · 4 Oct 2026
- Inbox
- The API exposes inbox threads sorted by recent activity and messages across each thread's channels.zavu.dev · 4 Oct 2026
- Channels
- Supported channels include WhatsApp, SMS, one-way SMS, voice, email, Telegram, Instagram and Messenger.zavu.dev · 4 Oct 2026
- Routing
- Zavu can automatically select a channel based on the recipient and the sender's configured channels.zavu.dev · 4 Oct 2026
- AI agents
- Agents can answer across messaging channels and phone, use agent-specific knowledge bases and memory, and call customer-owned tools.zavu.dev · 4 Oct 2026
- Integrations
- The maker lists TypeScript, Python, Ruby, Go and PHP SDKs, an MCP server, agent skills, a CLI, an n8n node and a Vercel Marketplace integration.zavu.dev · 4 Oct 2026
- Planned integrations
- Zapier, Make, HubSpot, Salesforce, Shopify, WooCommerce, Zendesk, Intercom and GitHub are marked Coming Soon on the integrations page.zavu.dev · 4 Oct 2026
- Webhook security
- The messaging API page says webhooks carry an X-Zavu-Signature using HMAC; v2, which signs the timestamp with the body, is the default for new senders.zavu.dev · 4 Oct 2026
- Prepaid limit
- Zavu says sending is rejected when the prepaid balance reaches zero, while inbound messages and webhooks keep working.zavu.dev · 4 Oct 2026
- Free tier limit
- The free plan allows two channel connections and 2,000 messages per month shared across WhatsApp, Telegram, Instagram and Messenger.zavu.dev · 4 Oct 2026
- Support
- Pro includes direct chat with Zavu engineers from 9am to 7pm Eastern Time, Monday to Friday; free users get an in-product assistant and Discord community.zavu.dev · 4 Oct 2026
- Voice pricing
- The pricing page lists voice agents from $0.07 per minute and says premium models and voices cost extra and BYOK is unavailable for voice agents.zavu.dev · 4 Oct 2026
- Company
- The privacy policy identifies the legal entity as Zavu Labs Inc., incorporated in Delaware, United States, and gives a Dover, Delaware business address.zavu.dev · 4 Oct 2026
- Founder
- The maker's homepage names Victor Villalobos as Founder & CEO of Zavu.zavu.dev · 4 Oct 2026
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Sources
- zavu.dev/en/messaging-api· checked 4 Oct 2026
- zavu.dev/en/channels· checked 4 Oct 2026
- zavu.dev/en· checked 4 Oct 2026
- zavu.dev/en/integrations· checked 4 Oct 2026
- zavu.dev/en/pricing· checked 4 Oct 2026
- zavu.dev/en/privacy· checked 4 Oct 2026