SendiMessage

Overview

SendiMessage provides managed iMessage and SMS lines behind one REST API, for SaaS products, CRMs and AI applications. Its team reviews each use case, then provisions a dedicated line and an API key pair; there is no self-serve signup or sandbox. Messages go over iMessage where the line type and recipient support it, with one-way SMS fallback where configured. The platform launched on July 30, 2026, according to its changelog.

Key features

• Text plus one photo, video, audio file or PDF up to 50 MiB per message
• iMessage lookup for a number, cached for 7 days
• Message status, history and conversations by API
• Contacts with tags, custom variables and durable opt-out state
• Signed webhooks for replies, final send status and Apple line blocks
• Official SDKs for JavaScript and TypeScript, Python, PHP and Go, MIT licensed
• Inbound call forwarding per line

Pricing

The Developer Pilot costs $129 for the first month with one managed line. Production lines then cost $129 per line per month. Multi-line volume pricing and Enterprise plans are by quote, and SMS, carrier or provider usage may be billed separately depending on configuration.

How it compares to Linq

Both sell dedicated managed lines with SMS fallback, signed webhooks and TypeScript, Python and Go SDKs. Linq adds RCS, group chats, tapbacks, typing indicators, a CLI, an MCP server and a free Hobby tier, and states SOC 2 Type II. SendiMessage's $129 line price is below Linq's $260 Pro plan and it adds a PHP SDK, but its security page says it holds no SOC 2 certification and its terms are still drafts.

Best for

Product teams that want transactional and two-way customer messaging through a plain API and are comfortable with an assisted, review-based onboarding.

Sources

• sendimessage.com
• sendimessage.com/pricing
• sendimessage.com/developers
• sendimessage.com/api
• sendimessage.com/contracts/sendimessage-public-api.postman_collection.json
• sendimessage.com/security
• sendimessage.com/integrations
• sendimessage.com/integrations/automation/zapier
• sendimessage.com/integrations/crm/gohighlevel
• sendimessage.com/changelog
• sendimessage.com/company
• sendimessage.com/terms
• sendimessage.com/privacy
• sendimessage.com/learn/why-imessage-is-conditional
• sendimessage.com/imessage-api/ai-agents
• sendimessage.com/dedicated-messaging-lines
• github.com/sendimessage/sendimessage-js
• github.com/sendimessage/sendimessage-go
• github.com/sendimessage/sendimessage-php
• pypi.org/project/sendimessage