Built for the modern, edge-delivered web.
Speed of Light is the caching engine we wished existed — edge-first, set-and-forget, and complete in every plan. No upsells, no paid CDN tier, no guesswork.
Why we built Speed of Light.
We've spent years tuning WordPress sites for speed — and we kept hitting the same wall. The popular caching plugins do real work, but the experience around them is broken. The feature you actually need is gated behind a higher tier. The "edge" turns out to mean a monthly CDN bill. And after install you're handed dozens of toggles with no idea which ones are safe for your theme, your builder, your host.
So performance ends up being a project, not a product. You read documentation, you A/B-test settings, you break the admin bar, you roll things back. Most site owners never get past that — they leave half the speed on the table because turning it all on felt risky.
Speed of Light is our answer to that. It's an edge-first engine: full-page caching and one-click Cloudflare delivery live in the same plugin, working on Cloudflare's free plan — no separate CDN subscription to make your site fast. And it's set-and-forget: Smart Configuration analyzes your environment, recommends the right settings, and safely applies them, warning you before anything risky. Set it once and you're done.
The other half of the answer is the pricing. Every feature ships in every plan — page cache, native Redis object cache, Critical CSS, the edge, real-user monitoring, WP-CLI and the REST API. The only thing that changes between Solo, Studio and Agency is how many sites you run it on. Nothing is held hostage behind an upgrade.
We build it the way we'd want to use it: honest about what it does, careful about your site, and fast by default.
A few principles we won't bend.
They shape every release — and they're the reason Speed of Light works the way it does.
The edge is built in
Full-page caching and one-click Cloudflare delivery live in the same engine — on the free plan. No add-ons, no paid CDN tier to make your site fast.
One price, every feature
Object cache, Critical CSS, edge, monitoring — all of it, in every plan. The only difference is how many sites your license covers.
Born for block themes
Designed around the block editor and modern builders like Blocksy & GreenShift — not a legacy engine retrofitted for a world it wasn't made for.
Your data stays yours
Real-User Monitoring captures LCP, INP, CLS, FCP & TTFB from real visitors and stores it on your own site — never shipped to a third party.
Made for the people who ship.
Bloggers & publishers
Faster pages and green Core Web Vitals with no plugins to wire together — install, and let every visitor land on a page that's already waiting.
Agencies & freelancers
One license across client sites, settings import/export, WP-CLI and a REST API to automate from CI. Repeatable speed without re-learning a new tool each time.
WooCommerce stores
Carts, checkout and sessions are never cached — the safety engine recognizes 20+ known cookies — so your store stays correct while everything cacheable flies.
A Digitaldive product.
Speed of Light is built and supported by Digitaldive, a small team focused on practical, well-made WordPress tools. We answer our own support, ship regular updates, and every plan starts with a 7-day free trial — card required, cancel anytime. Questions, ideas or feedback? Reach us any time through our support form.
Ready for a faster WordPress?
The complete engine, one price. Install, enter your key — and let every visitor land on a page that's already waiting.