How does diffbill help open source maintainers?
The bottom line
Open source maintainers who receive corporate sponsorships, grants, or paid consulting need to report on delivered work. diffbill reads your merged PRs and generates clear invoices that document contributions — making sponsor reporting and grant compliance straightforward.
The problem
Why this matters for open source maintainers
Corporate sponsors want to see what their money funded — "merged 47 PRs" is not enough detail.
Grant reporting requires documenting delivered work in non-technical language.
Consulting work alongside OSS maintenance makes billing boundaries unclear.
Tracking which work is sponsored vs. volunteer is a manual exercise.
The solution
How it works
Connect the repositories where sponsored or paid work happens.
Select the date range matching your sponsor reporting period.
Review AI-generated descriptions that explain delivered work in sponsor-friendly language.
Create a professional invoice or export a summary for grant reporting.
The result
What changes
Professional sponsor invoices
Send sponsors clear documentation of what their funding produced — not just a PR count.
Simpler grant compliance
Generate reporting-ready summaries that document delivered work in non-technical language.
Clear consulting boundaries
Use date ranges and repo selection to separate paid consulting from volunteer OSS work.
Common questions
Can diffbill separate sponsored work from volunteer contributions?
Yes. Use date ranges and repository selection to scope billing to specific sponsored work, keeping volunteer contributions separate.
Is this useful for GitHub Sponsors?
Yes. Corporate sponsors often expect periodic reporting on what their sponsorship funded. diffbill generates those reports from your actual merged work.
Can I use diffbill for grant reporting?
The invoice output works well as a grant deliverable report. Each line item maps to shipped work with AI-generated non-technical descriptions.