Project Blue vs Zernio
Compare Project Blue and Zernio side by side: iMessage features, channels, developer tools, pricing and compliance, checked on each provider's own site.
Project Blue
iMessage, SMS and FaceTime Audio lines inside your CRM
- Starting price
- $166/month per line, billed annually
- Free plan
- Free trial on a shared line, verified numbers only
Zernio
One API for iMessage, SMS, WhatsApp, social DMs and calls
- Starting price
- $200/month per iMessage sender
- Free plan
- First 2 connected accounts free; free iMessage sandbox on a shared line
Project Blue supports 42 of the 77 features compared here, and Zernio supports 57.
Where Project Blue is ahead
Where Zernio is ahead
- Threaded replies
- Read receipts
- Edit and unsend
- Stickers
- Formatted text
- Rich link previews
- Location sharing
- RCS fallback
and 11 more in the table below.
Feature comparison
| Feature | ||
|---|---|---|
| iMessage messaging | ||
| iMessage | ||
| Group chats | ||
| Group management | ||
| Group name and photo | ||
| Mentions | Not listed | Not listed |
| Tapbacks | ||
| Threaded replies | Not listed | |
| Typing indicators | ||
| Read receipts | Not listed | |
| Edit and unsend | Not listed | |
| Message effects | ||
| Animated text effects | Not listed | Not listed |
| Stickers | Not listed | |
| Formatted text | Not listed | |
| Attachments | ||
| Live Photos | Not listed | Not listed |
| Rich link previews | Not listed | |
| Voice messages | ||
| Contact cards | ||
| Polls | Not listed | Not listed |
| Chat backgrounds | Not listed | Not listed |
| Location sharing | Not listed | |
| iMessage apps | Not listed | Not listed |
| Live app cards | Not listed | Not listed |
| Sender name and photo | ||
| FaceTime calls | Not listedInbound FaceTime attempts show in the thread as call-typed messages. No calling documented. | |
| Delivery status | ||
| iMessage availability check | Not listed | |
| Focus and Notify Anyway | Not listed | Not listed |
| Numbers and delivery | ||
| Managed lines | ||
| Dedicated numbers | ||
| Shared numbers | ||
| Bring your own number | ||
| Line pooling | Not listedOne sender per profile; docs suggest spreading contacts across senders by hand. | |
| SMS fallback | ||
| RCS fallback | Not listedHomepage describes fallback from iMessage to WhatsApp to SMS. RCS fallback is not described. | |
| Outbound-first messaging | ||
| Calls on the iMessage number | ||
| Other channels | ||
| SMS | ||
| RCS | ||
| Telegram | Not supportedNot offered | |
| Slack | ||
Not supportedNot offered as a channel. iMessage senders can use an email handle. | ||
| Phone calls | ||
| Apple Messages for Business | Not supportedNot offered | Not supportedNot offered |
| Unified channel API | ||
| Developer tools | ||
| REST API | ||
| TypeScript SDK | ||
| Python SDK | Not listed | |
| Other SDKs | Not listed | |
| CLI | Not listed | |
| Webhooks | ||
| Signed webhooks | Not listedWebhook docs do not mention signatures. | |
| MCP server | ||
| Open source | ||
| Self-hosting | Not listedHosted service on Project Blue lines. Self-hosting is not mentioned. | Not supportedHosted cloud service only |
| Local testing | Not listedTrial accounts send real messages to verified numbers; docs say they are not a simulator. | Not listedThe free sandbox still needs your own phone or Apple ID. |
| Custom channel providers | Not listed | Not listed |
| Event replay | ||
| OpenTelemetry | Not listed | Not listed |
| No-code integrations | ||
| CRM integrations | ||
| Built for AI agents | ||
| Agent framework | Not listed | |
| Agent framework integrations | Not listed | |
| Streaming replies | Not listed | |
| Agent group chats | Not listed | Not listed |
| Human handoff | ||
| Audit logs | Not listed | |
| Message history API | ||
| Plans and compliance | ||
| Free plan | ||
| Public pricing | ||
| No per-message fees | ||
| Uptime SLA | Not listedSite cites a 99.9% uptime record and a public status page. No contractual SLA found. | Not listedSite states 99.97% uptime; no contractual SLA found. |
| Isolated infrastructure | Not listed | |
| SOC 2 Type II | Not listed | |
| GDPR |
Checked on each provider's own site and docs on 2026-10-25. “Not listed” means the provider does not mention it.
Pricing
Project Blue
Flat per-line pricing: $166 a month per line billed annually or $199 a month per line on a 12-month plan, with a free trial on a shared line.
Pricing model: flat per line
SourceZernio
An iMessage sender costs $200 a month plus Zernio's per-account fee, with a free sandbox; SMS, calls and outbound messages past 10,000 a month are metered.
Pricing model: flat per sender, plus per connected account and usage meters
SourceWhich should you choose?
Choose Project Blue if you need FaceTime calls, iMessage availability check, line pooling and isolated infrastructure.
Choose Zernio if you need threaded replies, read receipts, edit and unsend and stickers.
Frequently asked questions
Project Blue supports 42 of the 77 features compared here, and Zernio supports 57. Project Blue adds FaceTime calls, iMessage availability check, line pooling and isolated infrastructure. Zernio adds threaded replies, read receipts, edit and unsend, stickers and formatted text.
Project Blue: Flat per-line pricing: $166 a month per line billed annually or $199 a month per line on a 12-month plan, with a free trial on a shared line. Zernio: An iMessage sender costs $200 a month plus Zernio's per-account fee, with a free sandbox; SMS, calls and outbound messages past 10,000 a month are metered.
Zernio does not list FaceTime calls on its site or in its docs.
Zernio does not list iMessage availability check on its site or in its docs.
Zernio does not list line pooling on its site or in its docs.