--- title: "Filyhost: a monetised SaaS built solo with AI agents in 3 weeks" description: "Filyhost is my live file-handover SaaS: built solo in 3 weeks, a Stripe licence ladder, 8 edge rate limiters, resumable downloads verified at 3 GB." canonical: "https://webrevolution.si/work/filyhost/" updated: "2026-10-05" published: "2026-10-05" words: 1941 jsKb: 3.3 --- OWN PRODUCT · LIVE ↗ File handover · SaaS + client portal · 2026 # A live, monetised SaaS, built and run by one person, from empty repo to launch in 3 weeks Filyhost hands files to clients and gets files back: one private link out, one inbox link back, and no account for the client. It runs on Cloudflare’s edge, so the bill grows with stored gigabytes, not with visitors. Licences sell through Stripe on a rising price ladder, and a self-serve ad slot is open to advertisers. Live at filyhost.com · built 31 Aug–21 Sep 2026 · 173 commits · numbers observed 2026-10-05 [I want this for my business →](https://webrevolution.si/start/?goal=tool&ref=filyhost) [Book 20 min](https://webrevolution.si/contact/#book) [Open the live product: filyhost.com](https://filyhost.com/) Case file 03 / 9 3 weeks from empty repo to live, monetised SaaS observed 2026-10-05 · git history 31 Aug–21 Sep 2026 3 GB resumable download verified on the edge (built for 50 GB) observed 2026-10-05 · edge test 8 edge rate limiters observed 2026-10-05 · wrangler config Short answer Filyhost is a live file-handover SaaS I built alone in 3 weeks: a private link to send files, an inbox link for clients to send files back, no client account. It runs on Cloudflare Workers, R2 and D1, sells lifetime licences through Stripe on a $29 → $119 ladder, and resumes large downloads at any byte. Snapshot **Type** Own product, live and monetised **Market** Agencies, freelancers, anyone who sends work to clients **Timeline** 3 weeks, 31 Aug–21 Sep 2026, 173 commits **Services shown** SaaS build · Client portal · Payments · Cost and abuse controls **Stack** Cloudflare Workers (vanilla JS), R2, D1, Turnstile, Stripe **Revenue** Lifetime licences on a $29 → $119 ladder, plus a self-serve ad slot **Built by** Vegard and his agent crew **Want one of these?** Custom AI Tools, Portals & Agent Endpoints from €8,900 · $9,800 [Start a project →](https://webrevolution.si/start/?goal=tool&ref=filyhost) 01 · Before ## Sending work is easy. Getting files back isn’t. The problem, as agencies live it. Every agency knows the routine. Big files go through a transfer service, folders through a cloud drive, the rest by email. Then you chase the client for their logo, their copy, their photos, and the paid tools that would fix it put a sign-in wall in front of the very person you need files from. How files change hands today the problem **sending** risk: One tool for big files, another for folders, email for the rest **receiving** problem: Chasing the client by email until something arrives **client** problem: Paid tools ask your client to create an account first **pricing** risk: Per-seat subscriptions for something you use twice a month **lifespan** risk: Links that live forever unless someone remembers to delete them *Brief to myself: one link out, one link back, no client account, files byte for byte, costs that follow storage only.* *Form · GET /audit/ · fields: Your website address · button: “Scan my site →”* **Building a client portal? First see what AI sees on your current site.** Free AI-readiness audit · about 60 seconds · no email needed for the score. 02 · What I built ## One link out, one link back Gold is a person acting. Teal is the edge at work. The whole product is a single Worker in plain JavaScript, with no framework and no build step. The browser does the heavy lifting on the way in, and the edge streams on the way out, so neither a huge upload nor a 50 GB download ever needs a big server. 1. Step 1 (you): Drop a folder, browser unzips & slices. Rejected here: Over budget (sign-ups pause first). 2. Step 2 (automated): Multipart upload, parts checked on arrival. 3. Step 3 (automated): Private link, expires on its own. Rejected here: Abuse report (kill switch, link gone). 4. Step 4 (client): Client opens, no account. 5. Step 5 (client): Sends files back, inbox link. 6. Step 6 (automated): Email on arrival, to you. 7. Step 7 (live): Resumable download, any byte, any size. *FIG 02 — A handover, end to end Two people act, the edge does the rest. Spend is guarded before it can run away, and abuse is shut down in place.* ![Filyhost home page on desktop: “Drag and drop to upload. Share your link.” with feature notes around the drop zone](https://webrevolution.si/_astro/filyhost-desktop.CNPIS7fm_Z9D9Al.png) ![Filyhost home page on a phone with the Choose files button and the sponsored slot](https://webrevolution.si/_astro/filyhost-mobile.HQFg5rqH_1VrTxy.png) *PLATE 01 — filyhost.com home, desktop and phone · live product, captured 2026-10-05* ![Filyhost inbox page: “Send the work. Get the work back.” with a diagram of one link between you and the client](https://webrevolution.si/_astro/filyhost-inbox-desktop.DI5ypu39_1TMI9F.png) ![Filyhost licence page: a one-time price, not a subscription, and what Premium adds](https://webrevolution.si/_astro/filyhost-upgrade-desktop.Djh9utUw_Yeuuq.png) *PLATE 02 — Inbox links and the one-time licence, desktop · live product, captured 2026-10-05* 03 · Who did what ## Who did what Agents propose. A human approves. 1. agent://researcher Mapped how agencies hand work over today and where each tool forces an account or a subscription. **Never allowed to:** choose the positioning. 2. human://vegard HUMAN GATE Chose the product: one link out, one link back, a one-time licence instead of a subscription. 3. agent://architect Drafted the storage model and a separate content domain, so an uploaded HTML file can never touch the app’s login. 4. agent://builder Wrote the Worker, the browser-side slicer, the streaming download and the Stripe price ladder to spec. 5. agent://tester Drove a real local server through upload, expiry and purge end to end, and caught a cron bug on its first run. 6. human://vegard HUMAN GATE Measured the passkey library at 48% of the bundle and cut it. Evidence over features. 7. agent://watcher Guards spend, runs 8 rate limiters and sends a daily ops email. **Never allowed to:** let the bill run away: new sign-ups pause first, then new uploads. 8. human://vegard HUMAN GATE Ships every release from a clean, pushed commit. The deploy script refuses anything else. 04 · Results ## Results, with receipts Every number dated, with its method. *Filyhost: results with method and date* | Number | What it measures | How it was measured | Observed | | --- | --- | --- | --- | | 3 weeks✓ verified | from empty repo to live, monetised SaaS | git history 31 Aug–21 Sep 2026 | 2026-10-05 | | 173✓ verified | commits | git history | 2026-10-05 | | ~0.1 s✓ verified | of CPU to stream a 50 GB inbox download as TAR (vs ~91 s with ZIP's CRC-32) | edge benchmark | 2026-10-05 | | 3 GB✓ verified | resumable download verified on the edge (built for 50 GB) | edge test | 2026-10-05 | | 8✓ verified | edge rate limiters | wrangler config | 2026-10-05 | | 8,695✓ verified | disposable-email domains blocked, list refreshed weekly | blocklist size | 2026-10-05 | | $29 → $119✓ verified | lifetime licence price ladder | pricing config | 2026-10-05 | | Not published | Revenue and customer count | own product; revenue figures stay private | — | 05 · Running costs ## What it costs to run Storage, not traffic. There is no server to keep warm. Files sit in object storage and are streamed from the edge, and streaming a 50 GB folder as a TAR archive takes ~0.1 s of CPU. So the bill follows stored gigabytes, not visitors. A budget guard watches spend: at the limit it pauses new sign-ups, and if spend keeps rising it pauses new uploads, while every existing link keeps working. **CPU for a 50 GB download stream a 50 GB inbox download as TAR (vs ~91 s with ZIP's CRC-32)** ~0.1 s **Edge rate limiters abuse and cost protection, before any code runs** 8 **Disposable-email domains blocked refreshed weekly, so free accounts stay real** 8,695 06 · Ownership ## What you would own If I built a portal like this for you. - **The repository** Every line, with the release history: each live version is a pushed, diffable commit. - **Your Cloudflare account** Workers, object storage, database, rate limiters and cron, in your name. - **Your Stripe account** Prices, the ladder logic and payouts go straight to you. - **A separate content domain** So files your users upload can never reach your app’s login. - **Ops email and runbook** A daily report, the budget guard settings and the abuse kill switch, documented. - **The lifecycle tests** Upload, expiry and purge, driven end to end against a real server. 07 · What I’d build for you ## A client portal or paid tool that runs itself, on your accounts Client portals, file intake, quote tools, member areas: if your business sends things to clients or needs things back, I’ll build the portal with the same discipline. Payments, abuse handling and cost guards are part of the build, not phase two. - Portal or tool on your domain, your Cloudflare and your Stripe - No client accounts unless you want them; one-time codes instead of passwords - Budget guard and rate limits from day one - Optional MCP endpoint so your clients’ AI agents can use it **Not for you if** an off-the-shelf tool already does the job. I’ll tell you so on the first call. Mapped offer · Chosen ### Custom AI Tools, Portals & Agent Endpoints from €8,900 · $9,800 typical €9k–25k 3–8 weeks [Start with this →](https://webrevolution.si/start/?goal=tool&ref=filyhost) [What’s included](https://webrevolution.si/services/custom-ai-tools/) [Not sure which fits? Book 20 minutes with me](https://webrevolution.si/contact/#book) **08 · Under the hood The technical depth, for your CTO** **Runtime** Cloudflare Workers in vanilla JavaScript, no framework, no build step: ~20,000 lines of source. R2 for files, D1 for accounts and links, the Cache API, three cron triggers. **Uploads** Zips are unpacked in the browser with `DecompressionStream`, never held in memory whole. Files are sliced and uploaded as multipart parts, each validated on arrival, so a bad upload fails fast instead of at 100%. **Downloads** A streaming USTAR archive instead of ZIP: a 50 GB inbox costs ~0.1 s of CPU to stream, where ZIP’s CRC-32 would burn about 91 s. Downloads resume at any byte offset with zero stored state (fixed-length stream plus ETag and If-Range). Verified at 3 GB on the edge. **Isolation** User content is served from a separate registrable domain, so uploaded HTML can never touch the app’s auth scope. **Abuse and limits** 8 rate limiters, Turnstile, a weekly-refreshed blocklist of 8,695 disposable-email domains, and a kill switch that takes a reported link down in place. **Viral links** A link that goes viral costs one database read per data centre per minute, memoised in the Cache API, not one per request. **Payments** Stripe, with a lifetime licence that climbs $29 → $119 as live sales accumulate. Ads in the sponsored slot are bot-filtered and rotated by weight, rendered server-side with no layout shift. **Trade-offs** Passkeys were removed after measuring: one passkey library made up 48% of the Worker bundle (773 KiB). Evidence decided, not taste. **Launch film** The product film was rendered frame by frame from HTML, in 16:9 and 9:16, with a timed voiceover script. ## More work Same rules: numbers dated, names changed where a client asked. [All case studies →](https://webrevolution.si/work/) ![SitShape home page on desktop: “What shape do you sit in?” beside an isometric sofa drawing](https://webrevolution.si/_astro/sitshape-desktop.DhzKGA7D_Z3013u.webp) OWN PRODUCT · LIVE ↗ Crawler compute 103 → 0 ### [SitShape: a sofa-shape configurator and seller marketplace](https://webrevolution.si/work/sitshape/) 564 pre-rendered pages in 3 languages, 559 automated tests, sellers who never pay commission. - Configurator - Marketplace - Static edge ![TotalTax results on desktop: total tax burden, ranking and money left over for one household](https://webrevolution.si/_astro/totaltax-desktop.c2yOdIfq_1MLzns.webp) OWN PRODUCT · LIVE ↗ 15 countries, every US state, 26 cantons ### [TotalTax: a sourced tax engine for 15 countries](https://webrevolution.si/work/totaltax/) The build fails if any figure lacks a dated source. ~1,100 automated tests. It runs in the browser by design, so nothing leaves it: the proof here is the engine, not AI visibility. - Calculator - Rules engine - Lead magnet ![Mock of the Cuckoo approval portal with a week of drafted posts for a fictional brand](https://webrevolution.si/_astro/cuckoo-tile.CW6D08NB_1eGvi6.webp) OWN PRODUCT · PILOT Core built in ~2 days ### [Cuckoo: a week of posts, approved from a phone](https://webrevolution.si/work/cuckoo/) 4 AI providers draft a week per channel; the client approves on the phone. Platform approvals pending. - Distribution engine - Approval portal This case maps to [Custom AI Tools, Portals & Agent Endpoints](https://webrevolution.si/services/custom-ai-tools/). The thinking behind builds like this: [field notes in Insights](https://webrevolution.si/insights/). --- ## Structured facts The page's JSON-LD (schema.org), flattened to text. ### WebSite: WebRevolution.si - url: https://webrevolution.si/ - inLanguage: en - publisher: WebRevolution.si ### OnlineBusiness: WebRevolution.si - alternateName: WebRevolution; webrevolution.si; WebRevolution SI - url: https://webrevolution.si/ - logo: https://webrevolution.si/icon-512.png - slogan: One man. An army of agents. - description: One-man AI agency for B2B: AI-ready websites, AI content & distribution engines, AI agents and custom tools that AI assistants can find, cite and recommend. - founder: Vegard Wikeby - areaServed: Worldwide - knowsAbout: Generative engine optimization; AI-ready websites; AI agents for business; AI content engines; Cloudflare Workers; Conversion rate optimization; Model Context Protocol - contactPoint: ContactPoint (contactType: sales; url: https://webrevolution.si/contact/; availableLanguage: en) - sameAs: https://www.linkedin.com/in/vegardwikeby; https://x.com/vegardwikeby ### Person: Vegard Wikeby - url: https://webrevolution.si/about/ - jobTitle: Founder, WebRevolution.si - worksFor: WebRevolution.si - image: https://webrevolution.si/img/vegard-wikeby.jpg - sameAs: https://www.linkedin.com/in/vegardwikeby; https://x.com/vegardwikeby - knowsAbout: Web development; AI agents; Generative engine optimization; WordPress; E-commerce; Cloudflare ### BreadcrumbList - Home › Work › Filyhost ### Article: A live, monetised SaaS, built and run by one person, from empty repo to launch in 3 weeks - url: https://webrevolution.si/work/filyhost/ - mainEntityOfPage: https://webrevolution.si/work/filyhost/ - inLanguage: en - description: Filyhost is my live file-handover SaaS: built solo in 3 weeks, a Stripe licence ladder, 8 edge rate limiters, resumable downloads verified at 3 GB. - author: Vegard Wikeby - publisher: WebRevolution.si - isPartOf: WebRevolution.si - datePublished: 2026-10-05 - dateModified: 2026-10-05 - image: https://webrevolution.si/og/work/filyhost.png - about: Service (name: Custom AI Tools, Portals & Agent Endpoints; url: https://webrevolution.si/services/custom-ai-tools/) - mentions: WebApplication (name: Filyhost; url: https://filyhost.com/; applicationCategory: BusinessApplication)