Comms by Osis vs rustpush
Compare Comms by Osis and rustpush side by side: iMessage features, channels, developer tools, pricing and compliance, checked on each provider's own site.
Comms by Osis
iMessage, RCS, SMS and WhatsApp API with hosted agents
- Starting price
- $50/month (shared line); $200/month per dedicated number
- Free plan
- Free: shared platform line, 100 messages a day, no card
rustpush
Rust library for the iMessage, FaceTime and APNs protocols
- Starting price
- Free
- Free plan
- Free source (SSPL v1)
Comms by Osis supports 43 of the 77 features compared here, and rustpush supports 39.
Where Comms by Osis is ahead
and 11 more in the table below.
Where rustpush is ahead
- Mentions
- Message effects
- Animated text effects
- Stickers
- Formatted text
- Live Photos
- Rich link previews
- Voice messages
and 7 more in the table below.
Feature comparison
| Feature | ||
|---|---|---|
| iMessage messaging | ||
| iMessage | ||
| Group chats | ||
| Group management | ||
| Group name and photo | ||
| Mentions | Not listed | |
| Tapbacks | ||
| Threaded replies | ||
| Typing indicators | ||
| Read receipts | ||
| Edit and unsend | ||
| Message effects | Not listed | |
| Animated text effects | Not listed | |
| Stickers | Not listed | |
| Formatted text | Not listed | |
| Attachments | ||
| Live Photos | Not listed | |
| Rich link previews | Not listed | |
| Voice messages | Not listedVoice notes are documented for WhatsApp only. | |
| Contact cards | Not listed | |
| Polls | Not listed | |
| Chat backgrounds | ||
| Location sharing | ||
| iMessage apps | Not listed | |
| Live app cards | Not listed | |
| Sender name and photo | ||
| FaceTime calls | ||
| Delivery status | ||
| iMessage availability check | ||
| Focus and Notify Anyway | Not listed | |
| Numbers and delivery | ||
| Managed lines | Not supportedA library; you register your own Apple ID and device identity | |
| Dedicated numbers | Not supportedNot offered | |
| Shared numbers | Not supported | |
| Bring your own number | ||
| Line pooling | Not listed | Not listed |
| SMS fallback | Not listed | |
| RCS fallback | Not listed | |
| Outbound-first messaging | ||
| Calls on the iMessage number | ||
| Other channels | ||
| SMS | ||
| RCS | Not listed | |
Not supportedNot offered | ||
| Telegram | Not supportedNot offered | Not supported |
| Slack | Not supported | Not supported |
Not supported | ||
| Phone calls | Not supportedNot offered; FaceTime only | |
| Apple Messages for Business | Not supportedNot offered | |
| Unified channel API | ||
| Developer tools | ||
| REST API | Not supportedRust library only; no HTTP API | |
| TypeScript SDK | Not listedOnly a runnable Node.js example is published. | Not listedRust crate only |
| Python SDK | Not listed | Not listed |
| Other SDKs | Not listed | |
| CLI | Not listed | Not listed |
| Webhooks | Not supportedLibrary only; your code receives messages directly, no webhooks | |
| Signed webhooks | Not supportedNo webhooks | |
| MCP server | Not listed | |
| Open source | Not listed | |
| Self-hosting | Not listed | |
| Local testing | Not listed | Not listed |
| Custom channel providers | Not listed | Not listed |
| Event replay | Not listed | |
| OpenTelemetry | Not listed | Not listed |
| No-code integrations | Not listed | |
| CRM integrations | Not listed | Not listed |
| Built for AI agents | ||
| Agent framework | Not listed | |
| Agent framework integrations | Not listed | Not listed |
| Streaming replies | Not listed | Not listed |
| Agent group chats | Not listed | Not listed |
| Human handoff | Not listed | |
| Audit logs | Not listed | Not listed |
| Message history API | ||
| Plans and compliance | ||
| Free plan | ||
| Public pricing | Not listedNo prices or commercial license terms published | |
| No per-message fees | ||
| Uptime SLA | Not listed | |
| Isolated infrastructure | Not listed | |
| SOC 2 Type II | Not listed | Not listedSelf-hosted; compliance is up to the operator |
| GDPR | Not listedThe privacy policy mentions GDPR rights; no DPA was found. | Not listed |
Checked on each provider's own site and docs on 2026-10-25. “Not listed” means the provider does not mention it.
Pricing
Comms by Osis
Free on a shared line with 100 messages a day, Plus at $50 a month on a shared line, Dedicated at $200 a month per number with $0 setup, and custom Enterprise; AI usage is billed separately.
Pricing model: flat monthly per plan or dedicated line; AI usage and call minutes extra
Sourcerustpush
rustpush is free source under SSPL v1; you supply Apple hardware identifiers or an always-on iPhone relay, and anyone offering it as a service must publish their service's source.
Pricing model: free self-hosted library
SourceWhich should you choose?
Choose Comms by Osis if you need contact cards, polls, managed lines and dedicated numbers.
Choose rustpush if you need mentions, message effects, animated text effects and stickers.
Frequently asked questions
Comms by Osis supports 43 of the 77 features compared here, and rustpush supports 39. Comms by Osis adds contact cards, polls, managed lines, dedicated numbers and shared numbers. rustpush adds mentions, message effects, animated text effects, stickers and formatted text.
Comms by Osis: Free on a shared line with 100 messages a day, Plus at $50 a month on a shared line, Dedicated at $200 a month per number with $0 setup, and custom Enterprise; AI usage is billed separately. rustpush: rustpush is free source under SSPL v1; you supply Apple hardware identifiers or an always-on iPhone relay, and anyone offering it as a service must publish their service's source.
rustpush does not list contact cards on its site or in its docs.
rustpush does not list polls on its site or in its docs.
rustpush does not support managed lines.