KeelStack vs Sponsy
Built for sponsor agencies managing dozens of deals across multiple team members. $79/mo (Growth) or $109/mo (Scale) with 15 seats, 10 publications, native ESP integrations (beehiiv, Mailchimp, Kit, Campaign Monitor, Ghost, Sailthru, Omeda), automated performance reporting, and a branded sponsor portal with login. Wrong ICP — a solo creator pays for 15 seats and 10 publications they will never fill. The team-collaboration features are dead weight at solo scale.
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
Built for sponsor agencies managing dozens of deals across multiple team members. $79/mo (Growth) or $109/mo (Scale) with 15 seats, 10 publications, native ESP integrations (beehiiv, Mailchimp, Kit, Campaign Monitor, Ghost, Sailthru, Omeda), automated performance reporting, and a branded sponsor portal with login.
Starting price: $79/mo
Limitation: Wrong ICP — a solo creator pays for 15 seats and 10 publications they will never fill. The team-collaboration features are dead weight at solo scale.
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 | Sponsy |
|---|---|---|
| Pricing model | Flat $39 / $59 per month | $79/mo (Growth) · $109/mo (Scale) |
| Sponsor pipeline Kanban | 5-stage drag-and-drop | Yes, team pipeline |
| Magic-link sponsor portal | Yes — no sponsor account, 24h expiry | Team portal with sponsor login |
| 30 / 14 / 7-day renewal reminders | Automatic, from notify.keelstack.me | Manual reminders (Scale plan) |
| Branded performance reports | One-page branded, print-ready | Standard templates + auto ESP metrics |
| ESP integrations | Platform-agnostic (any ESP) | 8+ native (beehiiv, Mailchimp, Kit…) |
| Percentage of revenue taken | 0%, ever | 0% |
| Built for solo creators (3–15 deals) | Yes — ICP is solo creators | No — built for 15-seat teams |
| GDPR export & delete | One-click, built in | Varies |
| Append-only audit trail | Every action logged | Team activity logs |
Sponsy is a solid team tool. But you are not a team — you are one person with 3–15 sponsors. KeelStack is the tool shaped like your actual workflow.
Flat pricing. No revenue cut. Built for one person running direct deals.
Why solo creators switch from Sponsy.
Three things KeelStack does that Sponsy does not — or charges extra for.
Sponsy charges per seat — you pay for 15 seats whether you use them or not. KeelStack is one flat $39 for one creator.
Sponsy has a portal — but it requires the sponsor to create an account. Friction. KeelStack's portal is one magic link, no account.
Sponsy has reminders — but they ping the team channel. KeelStack emails you (not your sponsor) at 30/14/7 days. Nobody else sees them.
Migrate from Sponsy 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.