SenderSignal is a web service for building email reputation, monitoring blacklists and deliverability, and testing inbox placement. Inbox Boost can set up a dedicated sending server and generate and publish SPF, DKIM, and return-path records through connected Cloudflare, Name.com, GoDaddy, or Dynadot accounts. Automated warmup follows a plan-based sending ramp with engagement signals and pauses when the bounce rate crosses a threshold. Placement tests report where an email lands across Gmail, Google Workspace, Microsoft 365, Yahoo, Zoho, and AOL. All plans include email alerts; Professional and above add Slack and HMAC-SHA256-signed webhooks. PagerDuty, Microsoft Teams, and Discord are listed as rolling out. The free tier covers two monitored domains and two inbox placement credits per month, with email alerts and no card required. New workspaces get a 30-day trial with deliverability monitoring. The pricing note lists paid plans from $49/mo. Above-plan assets pause after a seven-day grace window, while Inbox Boost volume is metered by monthly credits and capped by plan. Use cases include agencies, e-commerce, SaaS and transactional email, cold outreach, and high-volume sending.
Who it is for
SenderSignal suits teams monitoring email delivery and reputation, including agencies, e-commerce businesses, SaaS senders, cold outreach operations, and high-volume senders. Its free tier may fit those who need to monitor two domains and run a limited number of placement tests.
What is good
- Free tier covers two monitored domains.
- Includes two inbox placement credits per month.
- All plans include email alerts.
- Trial includes deliverability monitoring for 30 days.
- Placement tests cover six listed email services.
What to know first
- Free tier has two placement credits monthly.
- Assets above plan limits pause after a seven-day grace window.
- Inbox Boost volume is capped by plan.
- Some alert channels are still rolling out.
Verdict
SenderSignal combines monitoring, inbox placement tests, and sending warmup with a free tier and a 30-day trial. Review the plan caps and pause policy if you expect usage to exceed your allowances.
SenderSignal plans and pricing
All plansCompared on email deliverability software
- Free plan
- Yes
- Paid from
- $49/mo
- Inbox placement monitoring
- Yes
- Sender reputation monitoring
- Yes
- Authentication monitoring
- Yes
- Blocklist monitoring
- Yes
- API access
- Yes
