These two get compared constantly because they are the two names a buyer encounters first — Sendblue through Y Combinator and sheer search presence, Linq through its $20M raise and enterprise positioning. They are aimed at meaningfully different buyers.
The short version
| Linq | Sendblue | |
|---|---|---|
| Pricing visible | No — sales conversation required | Partly — $100/line published, enterprise quoted |
| Published plan does outbound | n/a | No — the $100 plan is reply-only |
| Channels | iMessage, RCS, SMS, voice | iMessage with fallback |
| SOC 2 Type II | Yes (vendor claim, and unique in the category) | No comparable public claim |
| Backing | $20M raised, Feb 2026 | Y Combinator |
| CRM | Publishes a GoHighLevel integration | API-first |
| Reported setup fee | Yes, reported | Yes — reported around $2,000 |
| Sandbox before contract | Yes | Published tier is self-serve |
Choose Linq if
- A security review stands between you and launch. SOC 2 Type II narrows this category to roughly one vendor, and that is decisive when it is decisive — detail here.
- You want more than iMessage. Four channels behind one API is genuinely less integration work than assembling it from two vendors.
- You use GoHighLevel. Linq publishes an integration; most competitors leave you to build it.
- You have volume worth negotiating. No published price cuts both ways — it means the number is negotiable.
Choose Sendblue if
- You are building an inbound AI agent. The $100/line plan is designed for exactly this, and the price is visible without a call.
- You want the most-used option. Scale brings documentation, community answers and fewer unknown unknowns.
- You have enterprise budget and want a known quantity. YC backing and reported scale are real signals of durability in a young category.
If you need outbound on a small-business budget, neither fits well
Sendblue's published plan cannot initiate conversations, and Linq will not quote you without a call. If you want to send appointment reminders for under $100 a month, Blooio at $39 or Photon are the realistic answers.
The comparison nobody runs
Both vendors are young companies operating on infrastructure Apple does not sanction. The most useful question is not which is better but which lets you leave more easily — because in this category that is the risk you are actually managing.
Ask both, in writing, how numbers are released if you cancel. Wrap whichever you pick behind your own interface on day one. Switching providers covers the mechanics; iMessage vendor risk covers why it matters.
Common questions
- Is Linq or Sendblue better for outbound messaging?
- Both handle outbound, but Sendblue's published $100/line plan is reply-only, so outbound requires its quote-only enterprise tier. Linq does not publish pricing at all. For outbound on a small budget, a self-serve vendor is usually the better fit.
- Which one has SOC 2?
- Linq advertises SOC 2 Type II and claims to be the only iMessage API with it. Sendblue does not make a comparable public claim.