Inkbox

Overview

Inkbox (Vectorly, Inc., backed by Y Combinator) gives AI agents a communication identity: an email inbox, a public tunnel URL and an Agent2Agent address, plus optional phone, iMessage and Slack. iMessage runs two ways: a shared router, where a person texts "connect @your-agent" to reach the agent, or a dedicated line that can start conversations and group chats.

Key features

• iMessage tapbacks, threaded replies, bubble and screen effects, media, typing indicators and read receipts
• Group chats of 2 to 8 people on dedicated lines
• Voice calls over the iMessage line or a VoIP number, with your own agent or hosted Voice AI (beta)
• Check whether a number is reachable over iMessage, SMS or RCS
• Contact memory across email, texts and calls, plus allow and block rules per agent
• Signed webhooks with replay, a remote MCP server, a CLI and TypeScript, Python and Rust SDKs

Pricing

• Free: $0 for 3 identities with shared iMessage, up to 2,000 messages a month and 3 recipients at a time
• Developer: $25 a month for 10 identities and one VoIP number (no iMessage) with 300 SMS and 30 call minutes
• Startup: $167 a month for 100 identities, one dedicated iMessage number with up to 100,000 messages a month, and nine VoIP numbers
• Enterprise: custom

Extra SMS/MMS and call minutes cost $0.03 each.

How it compares to Linq

Both offer managed iMessage with tapbacks, threaded replies, effects and group chats. Linq also documents adding and removing group members, group names and photos, polls, iMessage apps and Find My location, none of which appear in Inkbox's docs. A dedicated Inkbox iMessage line comes with the $167 Startup plan, while Linq Pro starts at $260 a month. Inkbox adds email, Slack and voice calls on the iMessage line; Linq's API does not place or answer calls. Linq states SOC 2 Type II; Inkbox names no certification.

Best for

Developers who want one identity per agent across email, phone and iMessage, starting free on shared iMessage.

Sources

• inkbox.ai
• inkbox.ai/pricing
• inkbox.ai/dpa
• inkbox.ai/terms-of-service
• inkbox.ai/docs/llms.txt
• inkbox.ai/docs/capabilities/imessage
• inkbox.ai/docs/api/imessage
• inkbox.ai/docs/api/imessage/messages
• inkbox.ai/docs/api/imessage/conversations
• inkbox.ai/docs/api/imessage/groups
• inkbox.ai/docs/api/imessage/reactions
• inkbox.ai/docs/api/imessage/messaging-capability
• inkbox.ai/docs/api/imessage/agent-avatar
• inkbox.ai/docs/capabilities/phone
• inkbox.ai/docs/capabilities/phone/hosted-call-agent
• inkbox.ai/docs/capabilities/slack
• inkbox.ai/docs/capabilities/a2a
• inkbox.ai/docs/webhooks
• inkbox.ai/docs/api/webhooks/deliveries
• inkbox.ai/docs/mcp-server
• inkbox.ai/docs/changelog
• github.com/inkbox-ai/inkbox