warmup.rocks VS CaptureAPI.dev

warmup.rocks's answer

• this:matters GmbH (the Swiss web agency behind the product, running client sites through it)

CaptureAPI.dev's answer:

• Independent SaaS founders using CaptureAPI for OG image generation
• Content and growth teams generating automated blog cover screenshots
• Small B2B platforms archiving compliance documents (PDF + screenshot)
• Side-project builders integrating preview images into their dashboards

Named customer references available on request as the user base grows.

warmup.rocks's answer

Most cache warmers run from one server, so they only warm the one CDN edge location that server happens to hit. CDNs like Cloudflare cache per data center, 300+ of them, and a HIT in Frankfurt says nothing about Singapore.

warmup.rocks is different:

• Warms from 42 countries on 6 continents, so the cache gets filled where your visitors actually are
• Verifies every response (cf-cache-status, x-cache) instead of just firing requests and hoping
• Shows hit ratio per edge location, so you see whether warming actually works
• Nothing to install: no plugin, no script tag, no DNS change

CaptureAPI.dev's answer:

CaptureAPI bundles website screenshots, HTML-to-PDF conversion, and OG image generation into a single predictable API endpoint. Unlike heavy headless-browser platforms, it offers a 200/month free tier, transparent flat-rate pricing, and a developer-first design with no per-call billing surprises.

warmup.rocks's answer

Three reasons:

• Geography. Competitors warm from a single region. We warm from 42 countries, which is the whole point of a CDN cache.
• Verification. We read the cache status header of every single response and report the actual hit ratio per location, so you see whether warming works instead of taking it on faith.
• Deploy integration. A deploy hook or our GitHub Action re-warms the cache right after you ship, which is exactly when it's coldest.

Plans start at $15/month with a 7-day free trial.

CaptureAPI.dev's answer:

Three reasons: (1) honest free tier — 200 captures/month, no credit card; (2) flat pricing ($9 / $29 / $79) instead of per-call confusion; (3) screenshot, PDF, and OG image generation all in one API rather than three separate services.

warmup.rocks's answer

Developers, agencies and store owners who run sites behind a CDN (Cloudflare, Fastly, CloudFront, Akamai, bunny.net) and serve visitors in more than one region. Typical cases:

• WordPress/WooCommerce sites where preload plugins stop at the server cache
• Shopify and Magento stores with a long product tail that never stays warm on its own
• Anyone whose deploys purge the edge cache and leave the first visitor per location with a slow load

CaptureAPI.dev's answer:

Indie developers, side-project builders, and small SaaS engineering teams who need a reliable screenshot/PDF/OG API without enterprise contracts. Common use cases: OG image generation, blog cover screenshots, automated archiving, and product preview generation for landing pages.

warmup.rocks's answer

I run a web agency in Switzerland, and for years I believed our sites were fast because we put them behind Cloudflare and saw HIT in the headers. Then I measured from other continents: pages that loaded in milliseconds from Zurich took multiple seconds from Tokyo or São Paulo, because each edge location keeps its own cache and most of them were cold.

I built a warmer for our own client sites first, then measured 408,000 CDN requests and found a miss is 3.5× slower than a hit at the median. That data convinced me this should be a product.

CaptureAPI.dev's answer:

CaptureAPI was built by an indie maker tired of stitching together Puppeteer scripts, paying enterprise prices for a single feature, and dealing with hidden rate-limit surprises. It launched in early 2026 as part of the DevToolsmith portfolio with the goal of offering screenshot, PDF, and OG generation under one developer-friendly API.

warmup.rocks's answer

• Node.js + TypeScript with Hono as the web framework
• SQLite for storage
• Astro for the public site, vanilla JavaScript for the dashboard
• Warming requests go through dedicated datacenter proxies in 42 countries

The whole thing runs on a plain VPS behind Cloudflare, which keeps it fast and cheap without a pile of infrastructure.

CaptureAPI.dev's answer:

Next.js 16, TypeScript, Vercel Functions (Fluid Compute), Playwright for headless rendering, Sharp for image processing, Upstash Redis for rate limiting and caching, Stripe for billing, and Sentry for observability. Serverless on EU + US edge for low latency.