SendLayer

SendLayer is a transactional sender focused on API and SMTP relay, domain authentication, logs, suppression management, bounce handling, blocklist monitoring, event webhooks, and analytics. Plans are simple but billed annually, and the entry plan is small at 1,000 emails per month.

Growth work lives or dies on targeting and measurement. What matters is whether behavioral triggers can be built without engineering time, whether the event stream supports attribution past the open, and whether deliverability holds when broadcast volume shares a reputation with product email.

Against behavior-triggered journeys, broadcasts, and winback campaigns measured on revenue, SendLayer covers event stream and the suppressions API, and does not cover scheduling and multi-tenant support. Whether that gap matters depends on how central those are to the build.

• Scheduling: No
• Event stream: Yes
• Deliverability: Transactional sender with authentication, active anti-spam, bounce handling, blocklist monitoring, and event-based webhooks. Public independent deliverability history is thinner than Postmark or SMTP2GO.
• Operating since: Not published
• Suppressions API: Yes
• Best published rate per 1,000: Tiers not published in comparable form
• Multi-tenant: No
• Free tier: Free trial up to 200 emails
• Starts at: $5/mo billed annually for 1,000 emails/mo

Transactional sender with authentication, active anti-spam, bounce handling, blocklist monitoring, and event-based webhooks. Public independent deliverability history is thinner than Postmark or SMTP2GO.

Small WordPress, app, or SaaS projects that need simple transactional delivery at low volume.

Teams that want monthly billing or large free-tier volume.