Unspam
Pre-send spam checker that scores your email, tests inbox placement, previews it in 50+ clients and suggests fixes with an AI assistant.
From $5/mo Free tier MCP server API
Bottom line
Unspam is a pre-send spam checker that scores an email, tests inbox placement and previews it in real email clients. It suits recruiters and small agencies who want to check a BD template or sequence step before it goes out, without paying for a full deliverability suite. There is a usable free plan, and the paid Custom plan is pay per test from a $5 monthly minimum.
Stands out for: Unspam combines a spam score, seed list placement test, 50+ client previews and an AI assistant that explains fixes, and the free plan already includes 21 tests a month plus the AI assistant. Its pay per test Custom plan starts at $5 a month, far below the flat monthly fees of most placement testers.
Watch out for: The API, MCP server, DMARC monitoring and scheduled tests all need the paid Custom plan, and the free plan keeps results for only 14 days. It tests and diagnoses emails but does not warm up mailboxes or send campaigns.
Overview
Unspam is a deliverability testing tool built around one simple step: send your real email to a test address and read the report. It scores the message from 0 to 100 using authentication, sender reputation, blacklist and content signals, and flags high risk regardless of score if SPF, DKIM or DMARC fails.
Beyond the spam score it runs inbox placement tests against seed mailboxes at Gmail, Outlook, Yahoo and other providers, renders previews across 50+ real email clients in light and dark mode, and produces AI eye-tracking heatmaps. An AI assistant reads the results and lists what to change.
The paid Custom plan replaces fixed tiers with pay per test pricing above a $5 monthly minimum. It adds Autopilot scheduled tests, DMARC report collection, email verification, 3 year retention, a REST API and a remote MCP server for Claude, ChatGPT, Cursor and Windsurf.
For a recruiter about to launch a business development sequence, Unspam is a quick way to catch a missing unsubscribe header, a blacklisted link or broken authentication before it costs you a sending domain.
Who it's for
Best for
- Recruiters testing a cold email template before launch
- Small agencies that want pay per test pricing
- Teams who want AI explanations of spam warnings
- Builders who want to run spam tests from Claude or ChatGPT
Not ideal for
- Teams that need mailbox warmup
- High volume senders wanting a flat unlimited plan
- Anyone who needs results kept long term on a free account
Key features
Spam score. Send any email to a unique test address and get a 0 to 100 score covering SPF, DKIM, DMARC, blacklists, links and content, with each warning explained.
Inbox placement test. A seed list across Gmail, Outlook, Yahoo and other providers shows whether a message lands in the primary inbox, promotions or spam.
AI assistant. Reads your test results and tells you which lines and settings to fix, included on the free plan.
Email previews and heatmaps. Renders your email across 50+ real clients and devices in light and dark mode, plus an AI eye-tracking heatmap of where readers look.
Autopilot. Save an email once and Unspam reruns the spam and placement tests on a schedule and emails you the score.
API and MCP server. A REST API with 44 endpoints and a remote MCP server over OAuth let Claude, ChatGPT or Cursor start tests and read results.
AI features
| What the AI does | Plan |
|---|---|
Only features named in the vendor's own documentation. Anything sold separately is marked as an add-on.
MCP server
https://unspam.email/mcp
First-party MCP at unspam.email. https://unspam.email/mcp.
Setup steps and live status MCP Directory Check your stack in the MCP readiness checker
Pricing
Unspam can be used with no account for 3 spam tests, 2 inbox placements and 1 device preview a month. The Free plan costs $0 and includes 21 tests a month (5 spam tests, 3 inbox placements, 3 device previews, 5 screenshots and 5 heatmaps), the AI assistant and 14 day data retention. The paid Custom plan is pay per test with a $5 monthly minimum, rates that drop with volume, DMARC monitoring, Autopilot scheduled tests, 3 year retention, full API and MCP access. Email verification costs from $6.40 per 1,000 addresses. Annual billing takes 15% off and every paid plan has a 14 day refund. Confirm current terms on the vendor site.
Checked 4 Nov 2026. Vendors change prices without notice.
Is Unspam expensive?
Unspam starts at $5/mo. We list 53 deliverability tools in total. 10 have a free tier, and those with a public price typically start around $29 a month.
- 5 quote-based
- 10 free tier
- 50 public price
Worked out automatically from every deliverability listing, so it updates as the directory changes.
Pros and cons
Pros
- Free plan with 21 tests a month
- AI assistant explains each fix
- Pay per test from $5 a month
Cons
- API and MCP only on paid plan
- Free results kept 14 days
- No warmup or sending
Integrations
Claude Claude Code ChatGPT Cursor Windsurf
What's new at Unspam
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How Unspam compares
See all Unspam alternatives, with what each one does differently and a head to head for every pairing.
| Tool | Free tier | From | MCP | API | Compare |
|---|---|---|---|---|---|
| | ✓ | $5/mo | ✓ | ✓ | |
| | – | $20/mo | – | – | Compare |
| | ✓ | $79/mo | – | – | Compare |
| | – | $39/mo | – | – | Compare |
$20/mo
MailReach adds mailbox warmup alongside spam testing, which Unspam does not do.
$79/mo Free tier
Folderly suits teams that want ongoing deliverability management rather than per test checks.
$39/mo
InboxEagle is another deliverability option to compare if you want a different take on placement monitoring.
Your next step
Shortlisting Unspam?
Still deciding? Ask an AI assistant about Unspam.
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Frequently asked questions
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