KeelStack vs SponsorKit
A Kanban deal pipeline (Inquiry → Negotiating → Contract → Invoiced → Paid) with a rate-card PDF generator, e-signature contract templates, and Stripe invoicing. Starter $29/mo (10 active deals), Pro $59/mo (unlimited deals + analytics), Agency $149/mo. Built for the sales side of sponsorships: getting a deal signed and paid. Stops at "paid." No sponsor-facing portal for asset delivery, no renewal reminders, and no post-campaign performance report — the exact three things that determine whether a sponsor books again. It solves the deal you are closing, not the one you are trying to keep.
Built for one-person newsletters and podcasts running 3–15 direct sponsorship deals. Flat $39/mo (Starter) or $59/mo (Pro). No percentage of revenue, ever. The magic-link portal is the wedge — sponsors upload their own assets without creating an account.
- 5-stage Kanban pipeline with drag-and-drop
- Magic-link portal — sponsors upload assets, no account needed
- 30/14/7-day renewal reminders via email
- Branded performance reports, print-ready
- Revenue dashboard with MRR, renewals, at-risk alerts
- CSV import, audit trail, GDPR export — all built in
Starting price: $39/mo · 2 months free on annual
A Kanban deal pipeline (Inquiry → Negotiating → Contract → Invoiced → Paid) with a rate-card PDF generator, e-signature contract templates, and Stripe invoicing. Starter $29/mo (10 active deals), Pro $59/mo (unlimited deals + analytics), Agency $149/mo. Built for the sales side of sponsorships: getting a deal signed and paid.
Starting price: $29/mo
Limitation: Stops at "paid." No sponsor-facing portal for asset delivery, no renewal reminders, and no post-campaign performance report — the exact three things that determine whether a sponsor books again. It solves the deal you are closing, not the one you are trying to keep.
Feature-by-feature: where KeelStack wins.
Every row is a thing you will actually use. One column is built for you. The other is built for someone else.
| Feature | KeelStack | SponsorKit |
|---|---|---|
| Pricing model | Flat $39 / $59 per month | $29/mo (Starter) · $59/mo (Pro) |
| Sponsor pipeline Kanban | 5-stage drag-and-drop | Yes — Inquiry to Paid |
| Magic-link sponsor portal | Yes — no sponsor account, 24h expiry | No portal — sponsors get a Stripe pay link |
| 30 / 14 / 7-day renewal reminders | Automatic, from notify.keelstack.me | No renewal reminders — only overdue-invoice nudges |
| Branded performance reports | One-page branded, print-ready | No reports — dashboard is revenue-only |
| ESP integrations | Platform-agnostic (any ESP) | None |
| Percentage of revenue taken | 0%, ever | 0% |
| Built for solo creators (3–15 deals) | Yes — ICP is solo creators | Yes — but for landing the deal, not keeping it |
| GDPR export & delete | One-click, built in | No public GDPR tools |
| Append-only audit trail | Every action logged | No audit trail |
SponsorKit gets the deal signed and paid. KeelStack keeps that sponsor coming back — the portal, the renewal reminders, and the report SponsorKit never sends.
Flat pricing. No revenue cut. Built for one person running direct deals.
Why solo creators switch from SponsorKit.
Three things KeelStack does that SponsorKit does not — or charges extra for.
A spreadsheet is free in dollars and expensive in hours — every deal means manual chasing, manual reminders, and manual reports. KeelStack costs $39/mo and does that work for you.
A spreadsheet has no portal. You collect assets over email, lose them in threads, and rebuild them every campaign. KeelStack automates this entirely.
A spreadsheet doesn't email you. The renewal lives in the contractEnd column until two weeks after it expired. KeelStack fires three reminders automatically.
Migrate from SponsorKit in an afternoon.
Start a 14-day free trial, add your sponsors, generate their portal links. If KeelStack doesn't fit, walk away — no credit card, no contract, no clawback.