Every founder tells me the same stories. At first, the idea was to launch in 1 month, but it has been almost six months, and the product is still not ready.
Domain verification. Link previews. Website thumbnails. Email validation. Each small feature needs its development, infrastructure, edge cases, and maintenance burden.
Here’s the uncomfortable truth: most of the code your team writes isn’t your product. It’s plumbing. And smart founders have figured out that plumbing is undoubtedly what you should outsource.
We’ll Build It Ourselves
Building in-house feels cheaper. It isn’t.
Take something as simple as let users verify they own their domain. Sounds like a half-day task. In reality, you’re now dealing with:
- DNS record parsing across multiple record types (TXT, MX, CNAME, A, AAAA)
- Handling DNS propagation delays and caching
- Rate limits from public resolvers
- Edge cases with wildcard records, CAA records, and DNSSEC
- A monitoring layer so you know when it breaks
What looked like a half-day ticket is now a two-week project with ongoing maintenance. Multiply that across five or six small features, and you’ve burned an entire quarter on infrastructure your users will never thank you for.
The founders who ship fastest understand a simple principle: build what makes you different, buy what makes you functional.
The Build-vs-Buy Filter
Before writing any code, run the feature through three questions:
- Is this core to our value proposition? If your users would describe your product without mentioning this feature, it’s not core.
- Does building it create a competitive moat? Generating a screenshot of a webpage doesn’t make your product harder to copy.
- Will we need to maintain it forever? Headless browsers, scrapers, and DNS resolvers don’t stay built. They drift, break, and demand attention.
If the answer to all three is no, you have your answer. Use a third-party API.
3 Common Features Founders Wrongly Build From Scratch
Here are three features that show up in nearly every SaaS roadmap and almost always get built the hard way.
1. Domain Verification and DNS Checks
If your product involves custom domains, email sending, or any kind of website ownership flow, you need DNS lookups. Email marketing platforms verify SPF, DKIM, and DMARC records. Website builders verify domain pointing via A or CNAME records. Security tools check CAA and MX configurations.
Building this in-house means managing DNS libraries, dealing with inconsistent responses across resolvers, and writing retry logic for propagation delays. None of this is hard, individually. All of it is annoying, collectively.
A service like the Geekflare DNS Lookup API returns structured DNS records with a single call. You get all record types and normalized responses.
Real use case: An email marketing SaaS can verify a customer’s sending domain in under a second during onboarding, check SPF and DKIM in the same flow, and surface clear errors when records are missing.
2. Link Previews and URL Metadata
The moment your product lets users paste a URL, someone on your team will ask: “Can we show a preview like Slack does?”
Sounds simple. It’s not.
You need to fetch the page, parse the HTML, extract Open Graph tags, fall back to Twitter Card tags, fall back again to standard meta tags. Handle missing or malformed data, and render it all without breaking when someone pastes a link to a large webpage.
Then sites update their markup, JavaScript-rendered pages don’t expose meta tags in raw HTML, and you’re maintaining a scraping pipeline that has nothing to do with your product.
The Meta Scraping API handles this in one call. Send a URL, get back title, description, images, favicons, and Open Graph data in a clean JSON structure.
Real use case: A bookmarking tool, CRM, or content collaboration app can generate rich preview cards when users paste URLs, with no scraping infrastructure to maintain.
3. Website Screenshots and Thumbnails
This is the one founders consistently underestimate. “Just spin up Puppeteer,” someone in the team says. Six months later, you have a fleet of headless Chrome instances, a queue for handling concurrency, retries for pages that hang, storage for the generated images, and a DevOps engineer who quietly hates you.
Screenshots seem trivial until you handle:
- Cold start latency for browser instances
- Memory leaks in long-running Chrome processes
- Sites that detect and block headless browsers
- Mobile vs. desktop viewports
- Full-page vs. above-the-fold captures
- Lazy-loaded images that aren’t ready when you snap
The Screenshot API turns all of that into a single API call. Pass a URL, get back an image.
Real use case: A marketplace can auto-generate listing thumbnails when vendors add new sites. A competitive intelligence tool can capture daily snapshots of competitor pages. A portfolio platform can create visual previews of user projects, all without managing a browser farm.
What You Actually Gain
The time savings are obvious. What’s less obvious is everything else you gain.
Faster iteration. When a feature is one API call, you can prototype it in an afternoon, ship it that week, and kill it next month if users don’t care. Try doing that with infrastructure you spent two months building.
Better reliability. API providers do nothing but make these features work. Their uptime, edge case handling, and performance will almost always beat what a generalist team can build in a sprint.
Predictable costs. You pay a monthly subscription. No surprise AWS bills when traffic spikes, no engineer-hours sunk into fixing a flaky scraper at midnight.
When You Should Build In-House
Third-party APIs aren’t always the answer. Build it yourself when:
- The feature is your actual product
- You have extreme volume where API costs exceed engineering costs at scale
- Data privacy or compliance requires the feature to stay in your infrastructure
- The functionality is so specific that no API serves your use case
For most SaaS founders, especially in the 0-to-product-market-fit phase, none of these apply. You’re trying to ship, learn, and iterate. Every week spent on plumbing is a week not spent on the thing that actually matters.
A Practical API-First Workflow
Here’s how the most pragmatic founders approach new features:
- Define the user-facing outcome. What does the user actually need to see or do?
- Search for an API before writing code. You’ll almost always find one.
- Prototype with the API in a day. Validate that users care before investing in infrastructure.
- Revisit only if needed. If the feature takes off and economics demand it, you can always migrate to in-house later.
This isn’t laziness. It’s leverage. Every hour your team spends on differentiated work compounds. Every hour spent on undifferentiated plumbing evaporates.
The Bigger Picture
The most successful early-stage SaaS products of the last decade weren’t built by teams who wrote everything from scratch. They were built by teams who knew exactly which problems were worth solving themselves, and which to hand off to specialists.
Stripe didn’t make payments companies stop building. It made them realize they shouldn’t have been building payments in the first place. The same shift is happening across every utility layer of modern software: DNS, scraping, screenshots, email, search, auth, analytics. There’s an API for each, and the founders who use them ship faster, spend less, and stay focused on what makes their product worth using.
So next time someone on your team says “we can just build it ourselves,” ask the harder question: should we?
Because the smartest thing a founder can build is the discipline to know what not to build.
