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SPECIFICTION
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SenderSignal

sendersignal.com

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Spec score 7.1 #28 of 31 in Email Deliverability Software

What it 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 sending ramp with engagement signals and pauses if bounce rate crosses a threshold. Placement tests report where real emails land across Gmail, Google Workspace, Microsoft 365, Yahoo, Zoho, and AOL. Email alerts are available on all plans; Slack and HMAC-SHA256-signed webhooks are listed for Professional and higher. PagerDuty, Microsoft Teams, and Discord are listed as rolling out. The free tier includes two monitored domains, email alerts, and two inbox placement credits each month, with no credit card required. New workspaces begin with a 30-day trial that includes deliverability monitoring. The pricing note lists paid plans from $49/mo. Assets over plan limits pause after a seven-day grace window, while Inbox Boost volume is metered by monthly credits and capped by plan.

Spec sheet

What it does
SenderSignal offers email reputation building, blacklist and deliverability monitoring, and inbox placement testing.Read 2 Oct 2026 · sendersignal.com
Audience
The site presents use cases including agencies, e-commerce, SaaS and transactional email, cold outreach, and high-volume senders.Read 2 Oct 2026 · sendersignal.com
Trial
New workspaces start with a 30-day trial that includes deliverability monitoring.Read 2 Oct 2026 · sendersignal.com
Integrations
Email alerts are available on all plans; Slack and HMAC-SHA256-signed webhooks are available on Professional and above.Read 2 Oct 2026 · sendersignal.com
Support
The Professional, Business, and Growth plans list priority support; Enterprise lists priority enterprise support with an SLA.Read 2 Oct 2026 · sendersignal.com
Headquarters
8 The Green, Dover, Delaware 19901, USARead 28 Sep 2026 · sendersignal.com
Maker
The pricing page identifies SenderSignal as a product of Info Science Labs.Read 2 Oct 2026 · sendersignal.com
Automated warmup
Inbox Boost runs a plan-based sending ramp with engagement signals and pauses automatically if the bounce rate crosses a threshold.Read 2 Oct 2026 · sendersignal.com
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.Read 2 Oct 2026 · sendersignal.com
Free tier
The free tier includes two monitored domains, email alerts, and two inbox placement credits per month, with no credit card required.Read 2 Oct 2026 · sendersignal.com
Other alert channels
The alerts page lists PagerDuty, Microsoft Teams, and Discord as rolling out.Read 2 Oct 2026 · sendersignal.com
Placement testing
Placement tests report where a real email lands across Gmail, Google Workspace, Microsoft 365, Yahoo, Zoho, and AOL.Read 2 Oct 2026 · sendersignal.com
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.Read 2 Oct 2026 · sendersignal.com

Plans and prices

Business Price not published Pricing page displays ₹22990/mo; it says customers outside India are billed in USD via Stripe. Up to 10 monitored domains/IPs · 5 Inbox Boost domains · 20 Inbox Intelligence credits/month · checks every 6 hours · up to 5 team members Read 2 Oct 2026 · sendersignal.com
Enterprise Priced on request Custom pricing. Unlimited monitored domains/IPs and Inbox Boost domains · custom credits · checks every 15 minutes · unlimited team members · enterprise support with SLA Read 2 Oct 2026 · sendersignal.com
Growth Price not published Pricing page displays ₹41990/mo; it says customers outside India are billed in USD via Stripe. Up to 30 monitored domains/IPs · 10 Inbox Boost domains · 50 Inbox Intelligence credits/month · checks every 1 hour · up to 10 team members Read 2 Oct 2026 · sendersignal.com
Professional Price not published Pricing page displays ₹4490/mo; it says customers outside India are billed in USD via Stripe. Up to 5 monitored domains/IPs · 1 Inbox Boost domain · 10 Inbox Intelligence credits/month · checks every 24 hours · 1 team member Read 2 Oct 2026 · sendersignal.com

Every SenderSignal plan and price →

Strong points and limits

Strong points

  • Free tier includes two monitored domains.
  • Two inbox placement credits monthly on the free tier.
  • Thirty-day trial includes deliverability monitoring.
  • Email alerts are available on all plans.

Limits

  • Assets over plan limits pause after a seven-day grace window.
  • Inbox Boost volume is metered and capped by plan.
  • Several alert channels are still rolling out.

Who it suits

SenderSignal suits agencies, e-commerce businesses, SaaS and transactional email teams, cold outreach users, and high-volume senders. It is relevant to teams monitoring sender reputation, authentication, blocklists, and inbox placement.

Verdict

SenderSignal brings warmup, monitoring, and placement checks into a web service, with a free tier and a 30-day trial. Paid plans start at $49/mo, and usage limits can pause assets or cap Inbox Boost volume.

Where Specifiction places it

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