Make the next fundraising decision with the evidence attached.
Practical implementation guides, maintained platform comparisons, and tools that do useful work before you create an account.
How we publish
Useful even if you never choose KindLumen.
Official sources for volatile pricing and product facts
Clear assumptions instead of manufactured certainty
Competitor strengths and KindLumen limitations included
Dates changed only when the substance changes
Three paths through the library.
Choose the task in front of you, then go straight to the comparison, guide, or working tool that helps.
Evaluate
Choose a donation platform
Compare pricing models, donor checkout, website fit, and operational tradeoffs using cited facts.
Open comparisonsBuild
Put giving on your website
Follow platform-specific installation guidance for WordPress, Webflow, Squarespace, Wix, and more.
Browse integrationsPlan
Run the numbers first
Model processing fees, recurring giving, campaign gift ranges, sponsorships, receipts, and year-end work.
Use the free toolsStart with the resources that carry the most evidence.
These pages show the standard we are applying as the library is reviewed and rebuilt.
Flagship comparison
KindLumen vs. Zeffy
A balanced decision guide with official sources, explicit assumptions, limitations, and a visible verification date.
Open resourceInteractive analysis
Donation fee calculator
Change the gift amount and published rates yourself. Variable donor tips are disclosed, not guessed.
Open resourceWordPress implementation
KindLumen donation forms for WordPress
See the plugin, shortcodes, block, campaign cards, and the handoff path before installing anything.
Open resourceStart with Stripe or WordPress.
Two practical guides for choosing the right Stripe path and installing KindLumen on a WordPress site.
How to Add a Stripe Donation Form to WordPress With the KindLumen Plugin
The KindLumen plugin connects a WordPress site to a KindLumen form, then adds a button, inline form, or campaign card without storing card or donor data in WordPress.
How to Accept Stripe Donations Without Writing Code
Stripe offers one genuinely zero-code donation route and several lower-code checkout routes. This guide separates them so you can choose without buying too much—or too little—technology.
Do the work here, without signing up.
Calculators, generators, and trackers run in your browser. Open the full library for privacy notes and export options.
Fundraising nights
Pledge counter
Tap amounts as people pledge. Live total, number of pledges, breakdown by amount, and a big-screen mode for the projector.
Islamic centers and Muslim donors
Zakat calculator
Cash, gold and silver, investments, business assets, and debts, with nisab by gold or silver. Nothing is saved or sent.
Every organization
Donation fee calculator
Compare estimated net proceeds using sourced, editable rates for Stripe, PayPal, Donorbox, Zeffy, Givebutter, and KindLumen.
Capital and building campaigns
Gift range chart
Enter a goal and get the classic gift pyramid: how many gifts at which levels, and how many prospects to ask.
Treasurers and admins
Donation receipt generator
Draft receipts, thank-you letters, and year-end statements with common language based on IRS Publication 1771. Review, then print or email.
Monthly giving programs
Recurring giving calculator
What a monthly gift adds up to for a donor, and what a program adds up to for you, with new donors and churn month by month.
Build the form, then make a real test donation.
KindLumen is free for organizations, connects to your own Stripe account, and supports one-time and recurring giving on the website you already have.