Self-hostable apps

Free app for babysitters who run their own business: score and answer inquiries, quote and schedule sits without double-booking, track who has paid, set aside self-employment tax…

9 questions answered

Free job bid calculator for contractors and service trades: labor with payroll burden, materials with waste, subs, contingency and overhead turned into a price at the profit…

2 questions answered

Free Canadian crypto capital gains calculator. Paste your buys, sales, swaps and staking income as a CSV and it works out the average adjusted cost base (ACB) of each coin…

2 questions answered

Keep subscribers who only needed a nudge. A cancellation flow for Stripe that asks why, offers a pause or a discount matched to the reason, and reports your save rate. Preview it…

Publish product updates on a public changelog page with Atom and JSON feeds and an embeddable What's new bell with an unread badge. Scheduled posts, drafts, Slack webhook. Open…

A free, open-source alternative to ChurnZero and Gainsight for small SaaS: learn from your own usage events which accounts are about to cancel, with an honest out-of-time accuracy…

Know when a cron job silently stops. Paste your crontab to get next runs, the right grace period and a wrapped line that pings a heartbeat monitor you can self-host with zero…

A free, open-source alternative to the forecasting add-ons of Pipedrive, HubSpot and Clari for small B2B teams: win chances learned from your own closed deals, a backtested…

A free, open-source alternative to Customer.io, Loops and Userlist: your app posts events, sequences send onboarding, trial and win-back email, and a goal event stops the rest…

Recover failed Stripe subscription payments with decline-code-aware retries and emails you control. Preview the recovery schedule for any decline code, then run the open-source…

3 questions answered

A free, open-source alternative to Sentry and Rollbar for small teams: groups the same bug together, alerts on new errors, regressions and spikes, one Node process and one JSON…

2 questions answered

Collect feature requests, let customers vote, catch duplicates as they type, publish a roadmap and a changelog with RSS. One small open-source server you run yourself. Free, MIT…

A free, open-source alternative to LaunchDarkly, Flagsmith and Unleash: percentage rollouts that stay sticky, targeting rules, segments, prerequisites and a kill switch in one…

Point any HTML form at your own server: spam scoring with visible reasons, an inbox, CSV export and email or Slack notifications. Open source, MIT, no per-submission fee. Test the…

A help center you host yourself: Markdown articles, typo-tolerant ranked search, helpful votes and a report of what visitors searched for and could not find. Open source, MIT, no…

Sell desktop apps, plugins and CLI tools with Stripe and issue signed license keys automatically. Generate a key pair, sign a test license and verify it right in your browser…

A free, open-source alternative to Bitly, Dub and Rebrandly: your own short domain, UTM-tagged campaign links, iOS/Android app routing, expiry, click limits and privacy-friendly…

A free, open-source alternative to Lago, Orb and Metronome for small SaaS: send usage events to your own server, get exact per-customer usage, tiered invoice previews, hard-limit…

See MRR, ARR, net revenue retention, logo churn and quick ratio from your Stripe subscriptions without paying a metrics service a share of your revenue. Paste a subscription…

A free, open-source alternative to MadKudu and Pocus for small SaaS: learn from your own signups which first-week behaviour comes before paying, with an honest out-of-time…

Run an affiliate or referral program on your own Stripe account: tracking link, recurring commissions, refund clawbacks, payout CSV. Plan what a program will cost you in your…

Turn Stripe invoices into a monthly revenue recognition schedule: billings, revenue recognised, deferred revenue and journal entries for your bookkeeper. Paste an invoice export…

Send a signing link, collect a typed signature with consent, and keep a certificate anyone can re-verify. A free, open-source, self-hosted alternative to per-envelope e-signature…

A booking page you host yourself: weekly hours, buffers, notice, your calendar's busy time respected, time zones, calendar invites, reminders and cancel or reschedule links. Open…

A free, self-hosted status page with uptime monitoring, 90-day bars, incidents, maintenance windows and alerts. An open-source alternative to Statuspage, Instatus and Better…

An open-source AI support agent you host yourself: it answers customers from your own help articles, cites them, offers articles when unsure and hands off to a person on refunds…

2 questions answered

A shared support inbox you host yourself: email and contact-form tickets, saved replies with suggestions, first-reply targets and a customer portal. Open source, MIT, no per-agent…

Run surveys and Net Promoter Score on a server you own: NPS with a 95% range, the words detractors use, results by source, CSV export and an alert on every detractor. Open source…

Collect customer testimonials with a link, approve the ones you want, and show them on your site with one script tag. Consent stored with every entry. Open source, MIT, one-click…

Turn more Stripe free trials into paying customers: card-on-file trials get an honest price-and-date heads-up, card-less trials get escalating add-a-card emails and an optional…

Free, self-hosted, cookie-free web analytics: visitors, sources, UTM campaigns and goals with revenue by source. An open-source alternative to Plausible, Fathom and Simple…

A free, open-source alternative to Viral Loops and Prefinery: a launch waitlist where confirmed referrals move people up the line, with fraud guards and batch invites. Clean a…

Never lose a Stripe, GitHub or Shopify webhook because your app was down. Self-hosted relay that verifies signatures, saves events before answering, retries with backoff and…

Free Amazon FBA vs FBM calculator: compare fulfillment paths after expected returns. Get net profit, max buy cost, the return rate that wipes the listing, when inbound placement…

24 questions answered

Free side-by-side comparison of eBay, Etsy, Amazon, Walmart, TikTok Shop, Mercari, Depop, Poshmark, Facebook Marketplace, and your own Shopify store on one item. Enter the price…

6 questions answered

See what a Reverb sale leaves after fees, shipping and gear cost, and whether to take an offer, consign, take a shop cash offer or accept a partial refund.

11 questions answered

Free Shopify fee calculator: see order profit after Shopify Payments or PayPal/Stripe, including the extra Shopify third-party transaction fee. Then compare Basic, Grow, Advanced…

22 questions answered

Free calculator for StockX sneaker, streetwear, and card sellers: find real net payout and net profit after the seller fee (which drops by seller level), the Fast Shipping…

5 questions answered

Free TikTok Shop profit calculator. See referral fees, creator commission, returns that keep the affiliate payout, and the announced 1 Oct 2026 8% + 1.5% schedule on the same SKU.

7 questions answered

Free Whatnot seller fee calculator. Commission on the hammer, processing on the checkout total (item + shipping + tax) plus $0.30, the $1,500 TCG cap, leftover after the label…

7 questions answered

Free marketplace fee comparison: enter one item and see net profit after fees and returns on eBay, Etsy, Amazon, Mercari, Reverb and a dozen more.

10 questions answered

Paste an RFP, RFQ or tender. Get a compliance matrix of every shall/must/required obligation with section numbers, categories and owner/status columns, plus the page limits, due…

2 questions answered

Free tile layout planner for installers and DIY. Enter a room, cut-outs and a tile; see the real layout, how many tiles to buy with offcut reuse, the cut list, and the starting…

2 questions answered

Free bid calculator for any trade: turn labor hours, materials, subs, overhead and a target margin into a price, your walk-away number, and what a competitor's lower quote…

2 questions answered

Free production mix optimizer for bakeries, workshops and small makers. Enter your products, margins and the hours or machines each one uses; it finds the most profitable weekly…

2 questions answered

Free employee schedule maker for restaurants, cafes, salons, shops and clinics. List the shifts to cover and your staff's availability, hour limits and wages; get a weekly roster…

20 questions answered

Free seating chart optimizer for weddings, banquets and events. Paste your guest list, say who sits together and who must be kept apart, and it assigns every guest to a table with…

8 questions answered

Free round robin schedule generator. Paste your team names and get a fair league schedule with real dates, balanced home and away, courts and time slots shared evenly, blackout…

28 questions answered

Free rental fleet size optimizer for tent, equipment, kayak, tool and party rental businesses. Enter your seasons, rental lengths, price and what a unit costs to own; it finds the…

2 questions answered

Free container load planner for small exporters, Amazon FBA and DTC sellers. Enter cartons or pallets, pick a 20 ft, 40 ft, 40 ft high cube, 53 ft trailer, box truck or pallet…

2 questions answered

Free owner-operator CPM calculator: fuel, truck note, insurance, and deadhead miles in one week. See all-in cost per mile and the loaded rate that actually covers the empty ones.

6 questions answered

Free shipping box size optimizer for online sellers. Enter your products and the cartons you could buy; it solves which 1 to 10 box sizes to stock so every order ships in its…

2 questions answered

Free local e-invoice check: drop a JSON, UBL, CII or Factur-X/ZUGFeRD invoice to catch missing fields, bad totals, VAT and IBAN typos. Nothing is uploaded.

61 questions answered

Free S corporation shareholder basis calculator. Enter each year's K-1 figures and get stock basis, debt basis and suspended losses carried forward in Form 7203 order, with…

6 questions answered

Free UK crypto capital gains calculator. Paste your buys, sales, swaps and staking income as a CSV and it applies HMRC's same-day, 30-day and Section 104 pooling rules, works out…

2 questions answered

Free UK Statutory Residence Test checker: enter your UK stays and ties to see which test decides, whether you are UK resident, and how many more days you can spend in the UK…

2 questions answered

Free ad budget optimizer for multi-channel advertisers. Upload weekly spend and revenue per channel to see each channel's diminishing-returns curve, the marginal return on the…

2 questions answered

Free cheapest meal plan optimizer. Enter foods with prices and nutrition, set calorie, protein, fat and fibre targets, and get the lowest-cost daily servings plus the cost of each…

5 questions answered

Free crypto cost basis calculator. Paste your buys, sales and income as a CSV; it matches every sale to your lots under FIFO, LIFO, HIFO, LOFO or a tax-aware rule, compares the…

5 questions answered

Free customer lifetime value predictor for online shops. Upload an order list to get each customer's predicted value, the chance they are still active, at-risk big spenders, what…

2 questions answered

Calculate invoice due dates, when cash actually lands on your client's payment run, late-fee scenarios, cash-flow exposure, whether a 2/10 Net 30 discount still beats waiting, and…

9 questions answered

No Surprises Act IDR offer calculator for out-of-network providers and billing teams. Enter billed charge, QPA and amount paid to see the offer with the best expected net, the win…

Free seller net sheet: see cash at closing after listing commission, optional buyer-broker compensation, concessions, title, and payoff. Compare two offers — the higher price is…

7 questions answered

Free multi-state residency day counter. Enter where you spent the year, see days per state against the 183-day and other statutory residency tests, the room you have left, the…

11 questions answered

Free calculator for DoorDash, Uber Eats, Instacart, Uber, and Lyft drivers: turn one session's gross pay into real net pay per hour and per mile after gas, maintenance, and…

6 questions answered

Free proposal generator for freelancers, consultants and small agencies: scope with included and excluded lists, phases with dates, fixed, good-better-best, hourly-with-cap or…

Free AI sales agent for the replies to your outreach. Paste them in: it spots unsubscribes, bounces, out-of-office and not-now replies, updates your list, and drafts answers to…

2 questions answered