SenderSignal
SenderSignal is a web service for email reputation building, blacklist and deliverability monitoring, and inbox placement testing.
What SenderSignal is
SenderSignal is a web service for email reputation building, blacklist and deliverability monitoring, and inbox placement testing. Inbox Boost can provision a dedicated sending server and generate and publish SPF, DKIM, and return-path records through connected Cloudflare, Name.com, GoDaddy, or Dynadot accounts. Its automated warmup follows a plan-based sending ramp with engagement signals and pauses if the bounce rate crosses a threshold. Placement tests show where a real 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, while PagerDuty, Microsoft Teams, and Discord are listed as rolling out. The free tier includes two monitored domains, email alerts, and two inbox placement credits per month, with no credit card required. New workspaces start with a 30-day trial that includes deliverability monitoring. The pricing note lists paid plans from $49/mo. Assets above plan limits pause after a seven-day grace window, and 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.
Good
- Free tier covers two monitored domains
- Two inbox placement credits monthly on free tier
- 30-day trial includes deliverability monitoring
- Inbox Boost can automate DNS record setup
- Tests placement across six listed email services
Watch out
- Free tier has two placement credits per month
- 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
Who it suits
SenderSignal suits teams monitoring email reputation and placement, including agencies, e-commerce, SaaS, cold outreach, and high-volume senders. Its free tier may suit users who need basic domain monitoring and a small number of monthly placement credits.
Verdict
SenderSignal combines reputation monitoring, placement tests, and automated warmup, with a free tier and trial to start. Check plan limits and credit caps against the volume of domains and sending activity you need to monitor.
Plans and prices
From SenderSignal's own pricing page, checked 2 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Business | — | Up to 10 monitored domains/IPs · 5 Inbox Boost domains · 20 Inbox Intelligence credits/month · checks every 6 hours · up to 5 team members · Pricing page displays ₹22990/mo; it says customers outside India are billed in USD via Stripe. |
| Enterprise | Priced on request | Unlimited monitored domains/IPs and Inbox Boost domains · custom credits · checks every 15 minutes · unlimited team members · enterprise support with SLA · Custom pricing. |
| Growth | — | Up to 30 monitored domains/IPs · 10 Inbox Boost domains · 50 Inbox Intelligence credits/month · checks every 1 hour · up to 10 team members · Pricing page displays ₹41990/mo; it says customers outside India are billed in USD via Stripe. |
| Professional | — | Up to 5 monitored domains/IPs · 1 Inbox Boost domain · 10 Inbox Intelligence credits/month · checks every 24 hours · 1 team member · Pricing page displays ₹4490/mo; it says customers outside India are billed in USD via Stripe. |
The facts
Each one read from SenderSignal's own pages, with the date it was checked.
What it does
- Audience
- The site presents use cases including agencies, e-commerce, SaaS and transactional email, cold outreach, and high-volume senders.checked 2 Oct 2026
- Automated warmup
- Inbox Boost runs a plan-based sending ramp with engagement signals and pauses automatically if the bounce rate crosses a threshold.checked 2 Oct 2026
- DNS setup
- Inbox Boost provisions a dedicated sending server and can generate and publish SPF, DKIM, and return-path records through connected Cloudflare, Name.com, GoDaddy, or Dynadot accounts.checked 2 Oct 2026
- Integrations
- Email alerts are available on all plans; Slack and HMAC-SHA256-signed webhooks are available on Professional and above.checked 2 Oct 2026
- Other alert channels
- The alerts page lists PagerDuty, Microsoft Teams, and Discord as rolling out.checked 2 Oct 2026
- Placement testing
- Placement tests report where a real email lands across Gmail, Google Workspace, Microsoft 365, Yahoo, Zoho, and AOL.checked 2 Oct 2026
- Support
- The Professional, Business, and Growth plans list priority support; Enterprise lists priority enterprise support with an SLA.checked 2 Oct 2026
- Usage limits
- The pricing page says assets above plan limits pause with a seven-day grace window, and Inbox Boost volume is metered by monthly credits and capped by plan.checked 2 Oct 2026
- What it does
- SenderSignal offers email reputation building, blacklist and deliverability monitoring, and inbox placement testing.checked 2 Oct 2026
Money
- Free tier
- The free tier includes two monitored domains, email alerts, and two inbox placement credits per month, with no credit card required.checked 2 Oct 2026
- Trial
- New workspaces start with a 30-day trial that includes deliverability monitoring.checked 2 Oct 2026
The company
- Headquarters
- 8 The Green, Dover, Delaware 19901, USAchecked 28 Sep 2026
- Maker
- The pricing page identifies SenderSignal as a product of Info Science Labs.checked 2 Oct 2026
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