You could build your own DNS checking tool. You could also hand-roll your own email server. Here's why most hosting companies and MSPs choose not to.
A DNS checker sounds simple until you start building one. Here's what teams discover along the way.
NS records, SOA validation, glue record checks, parent zone delegation, CNAME-at-apex detection, MX target resolution... Getting one check right is easy. Getting 25 checks right across edge cases takes months.
DNS standards evolve. Resolvers change behavior. Edge cases surface when a customer has an unusual setup. Your internal tool becomes someone's side project that nobody wants to own.
An internal script is one thing. A branded, client-facing tool with plain-language explanations, your logo, and your domain? That's a product, not a weekend project.
Every hour your team spends building DNS tooling is an hour not spent on your core product. For the cost of a few coffees per month, DNSLint handles it all.
| DIY | DNSLint | |
|---|---|---|
| Time to launch | Weeks to months | Minutes |
| Number of DNS checks | However many you build | 25 and growing |
| Concurrent execution | You implement it | Built-in async |
| AI-powered summaries | Integrate an LLM yourself | Included on all plans |
| Client-friendly results | Design and build a UI | Ready to share |
| Your branding | Build it yourself | Logo + custom domain |
| Ongoing maintenance | Your team's problem | We handle it |
| Monthly cost | Developer hours + hosting | From $9/mo |
NS, SOA, MX, parent zone, and domain checks run concurrently in milliseconds.
Plain-language explanations your clients actually understand. No more "what does this mean?" tickets.
Your logo, your colors, your subdomain or custom domain. Clients see your brand, not ours.
Every check gets a clean URL. Send it to a client or paste it in a ticket — they can re-run the same check with one click.
We keep the checks current, the infrastructure running, and the AI models updated. You focus on your business.
Try it with your real domains and your real clients. No credit card required to start.
Start your 7-day free trial. No credit card required.