Kit (ConvertKit)
Windmill
| Feature | Kit (ConvertKit) | Windmill |
|---|---|---|
| Pricing | Free / from $25/mo | Free / from $10/mo |
| Free Plan | ✓ Yes | ✓ Yes |
| Rating | 4.5 / 5 | 4.4 / 5 |
| Best For | creators, bloggers, podcasters, authors, course-creators | developers, devops-teams, internal-tools, data-pipelines |
| Founded | 2013 | 2022 |
| Email Sequences | ✓ | ✗ |
| Visual Automations | ✓ | ✗ |
| Landing Pages | ✓ | ✗ |
| Commerce | ✓ | ✗ |
| Subscriber Tags | ✓ | ✗ |
| Broadcasts | ✓ | ✗ |
| Creator Network | ✓ | ✗ |
| Workflow Editor | ✗ | ✓ |
| Script To Ui | ✗ | ✓ |
| Scheduling | ✗ | ✓ |
| Approval Flows | ✗ | ✓ |
| Multi Language | ✗ | ✓ |
| Self Hostable | ✗ | ✓ |
| Audit Logs | ✗ | ✓ |
✓ Kit (ConvertKit) Pros
- Designed for creators and writers
- Visual automation builder
- Free tier for up to 10,000 subscribers
- Commerce features for selling digital products
✗ Kit (ConvertKit) Cons
- Email templates less flexible than Mailchimp
- Limited design customization
- Reporting could be more detailed
✓ Windmill Pros
- Open-source and self-hostable
- Supports Python, TypeScript, Go, Bash, SQL natively
- Auto-generates UI from script parameters
- Excellent scheduling and workflow orchestration
✗ Windmill Cons
- Smaller community than Zapier/n8n
- Self-hosting requires infrastructure knowledge
- Less polished documentation for beginners
The Verdict
Kit (ConvertKit) is built for creators and bloggers, with a focus on email-sequences and visual-automations. Windmill targets developers and devops teams and leads with workflow-editor and script-to-ui.
On pricing, Windmill is the clear winner for budget-conscious users — starting at $10/mo compared to $25/mo for Kit (ConvertKit). That $15/mo difference adds up quickly for growing teams.
Both offer free plans, so you can test each with your real workflow before committing to a subscription.
This is a genuinely close comparison. If you can, sign up for both free trials (where available) and run a one-week test with your actual team tasks before deciding.
