toolgrep / Security / SubdomainWatch
Alternatives to SubdomainWatch
SubdomainWatch: Continuous attack surface monitoring and IaC guard preventing subdomain takeovers, dangling DNS records, and email hygiene flaws. 8 products similar to SubdomainWatch, compared on pricing, free tier, API, MCP server, SDK and open source. 8 of 8 have a free tier, 5 of 8 have an API, 1 of 8 offers an MCP server.
- IntoDNS.ai
DNS and mail server checker for SPF, DKIM, DMARC, DNSSEC, MTA-STS, BIMI, and blacklists
- Otterwatch
Daily SSL certificate expiry monitoring with an uptime check; emails only when something changes.
- CertPost
SSL certificate monitoring for teams and agencies
- HostedScan
Online vulnerability scanning platform
- Parsivex
Free AWS waste scan & cost monitoring
- Internet.nl
Test for modern Internet Standards like IPv6, DNSSEC, HTTPS, DMARC, STARTTLS and DANE.
- Webhooker
EU-hosted inbound webhook gateway with signature verification, durable storage, retries and replay.
- Have I Been Pwned
Check if your email address has been exposed in a data breach
Side by side
| Product | Pricing | Free tier | API | MCP server | SDK | Open source |
|---|---|---|---|---|---|---|
| SubdomainWatch | Freemium · from £0 | yes | yes | no | no | no |
| IntoDNS.ai | Free | yes | yes | yes | — | — |
| Otterwatch | Freemium · from $0 | yes | no | no | no | no |
| CertPost | Freemium · from $0 | yes | yes | no | no | no |
| HostedScan | Freemium · from $39 | yes | yes | no | no | no |
| Parsivex | Freemium · from $39/month | yes | — | — | — | no |
| Internet.nl | Free | yes | — | no | — | — |
| Webhooker | Freemium | yes | yes | no | no | no |
| Have I Been Pwned | Freemium | yes | yes | no | no | no |
Facts come from each product's own website, or from its verified owner when they have edited the listing. Each product page shows when it was last verified and how it was extracted. Similarity comes from the products' descriptions.
API
curl https://toolgrep.com/api/products/subdomainwatch/alternatives