MxToolbox Inbox Placement vs Unspam.email
MxToolbox Inbox Placement
mxtoolbox.com
Unspam.email
unspam.emailSide by side
| Figure | MxToolbox Inbox Placement | Unspam.email |
|---|---|---|
| Price from | $129/mo | $5/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | Yes |
| Plans published | 5 | 7 |
| Spec score · Email Deliverability Software | 8.7 (#5) | 8.5 (#7) |
| API authentication | API requests use HTTPS, JSON responses and an API key supplied in the Authorization header. | REST requests use bearer tokens created per integration; tokens can be revoked individually and invalid or unauthorized calls return 401 or 403. |
| Authentication checks | It analyzes email headers and DNS records for SPF, DKIM, and DMARC configuration and compliance. | The product checks SPF, DKIM, DMARC, BIMI, reverse DNS, list-unsubscribe headers, broken links, short URLs and domain age or suffix. |
| Headquarters | Austin, Texas, United States | The company lists 167 Madison Avenue, Suite 205, New York, New York 10016, United States, and a Barcelona office. |
| Intended users | MxToolbox describes Delivery Center as serving email novices, professionals, marketers, and technicians. | The company describes the platform as serving marketers, founders, agencies, and product teams. |
| Purpose | Inbox Placement tests where messages land at major inbox providers: Inbox, Spam/Junk, or undelivered. | Unspam is an email deliverability platform that checks spam signals, sender authentication, blacklists, previews, heatmaps, and inbox placement. |
| Rating on Capterra | 4.5 out of 5 from 6 reviews | 5.0 out of 5 from 1 review. |
| Rating on G2 | 4.1 out of 5 from 29 reviews | 4.8 out of 5 from 32 reviews. |
| Refund policy | The product page advertises a risk-free 30-day money-back policy with Delivery Center access. | Paid plans have a 14-day no-questions-asked refund window tied to the original purchase or latest renewal. |
| Support | Paid-plan features include onboarding support and an account walkthrough with an expert support team. | The company lists support chat and [email protected] for support or product inquiries. |
| What it does | Inbox Placement reports whether messages sent to major mailbox providers reach the inbox, spam/junk, another category, or fail delivery. | Unspam.email is a deliverability platform combining spam tests, authentication and blacklist checks, previews, heatmaps and inbox-placement testing. |
Plans
MxToolbox Inbox Placement
- FreeFree
- Delivery Center$129 a month
- Delivery Center$129 a month
- Delivery Center Plus$399 a month
- Delivery Center Plus$399 a month
Unspam.email
- FreeFree
- No accountFree
- Custom plan$5 a month
- Basic$9 a month
- Business$19 a month
- Agency$29 a month
- White LabelPriced on request
In their own words
MxToolbox Inbox Placement
MxToolbox Inbox Placement has no write-up on Specifiction yet; its figures are above.
Unspam.email
Unspam.email is an email deliverability platform for examining spam signals, sender authentication, blacklists, previews, and inbox placement. Spam tests assess authentication, sender reputation, blacklists, and message content, then show which checks affected the score. Inbox placement tests send a campaign to seed mailboxes at Gmail, Outlook, Yahoo, and other providers and report where it landed. Email previews cover rendering across more than 50 real clients and devices in light and dark modes. Scheduled tests can track placement and spam scores and send alerts by email when results decline. Its API has 39 endpoints across seven areas and can test mail sent through SES, Postmark, SendGrid, Mailgun, or a sender’s own SMTP setup; an MCP server lets compatible AI clients run tests and retrieve results. The free plan includes 21 tests per month, unlimited sender accounts, and 14-day data retention, but excludes DMARC monitoring and full API access. Custom costs $5 a month, with a $5 monthly minimum and pay-per-test rates.