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.

A SaaS product sends on behalf of its customers, so the deciding factors are tenant isolation, whether suppressions can be scoped rather than global, and whether support can answer why one specific account did not receive one specific email. Lifecycle automation and transactional sending usually need to coexist.

Against trial expiry notices, dunning, onboarding sequences, and per-tenant transactional mail, SendLayer covers event stream, the suppressions API, and webhook coverage, and does not cover multi-tenant support and scheduling. Whether that gap matters depends on how central those are to the build.

• Multi-tenant: No
• Event stream: Yes
• Suppressions API: Yes
• Operating since: Not published
• Scheduling: No
• Best published rate per 1,000: Tiers not published in comparable form
• 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.
• Webhooks: Yes
• 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.