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FosterStack
What it is
FosterStack is a self-hosted remote build cache server intended as a replacement for Develocity Build Cache Node. It supports Gradle and the Apache Maven Build Cache Extension remote HTTP mode, although Maven acceptance coverage remains in progress. The server uses size-capped LRU eviction to make room for new entries, supports HTTP Basic Auth over TLS, and exposes Prometheus metrics plus a read-only status page for cache hit rates and size versus cap. It can run from a Docker image or as a static binary. Release binaries are available for Linux and macOS on amd64 and arm64; Windows is not built or planned. The core is MIT-licensed, releases include signed artifacts and SLSA provenance, and security patches are included in the free tier. The maker says the free core makes no outbound connections and collects no telemetry or usage data. FosterStack identifies the product as v0.1 and says no one outside its own work is yet using it in a production build pipeline. The free plan includes the full self-hosted cache server. Paid tiers are listed from $49/mo, but the Team, Business, and Compliance offers are described and not yet available.
For and against
For
- Free plan includes the full self-hosted cache server.
- Supports Gradle and Maven remote cache use.
- Offers Linux and macOS binaries for amd64 and arm64.
- Free core includes security patches.
- Maker says the free core collects no telemetry.
Against
- Maven acceptance coverage is still in progress.
- Windows is not built or planned.
- Product is identified as v0.1.
- Paid tiers are described but not yet available.
The verdict
FosterStack provides a free, self-hosted cache server with Gradle support and Maven support still in progress. Its maker identifies it as v0.1, and the listed paid plans are not yet available.
Who it suits
FosterStack suits teams using Gradle or Maven that want a self-hosted remote build cache. Its stated aim is to replace the discontinued standalone Develocity Build Cache Node.
Plans and prices
Free
Full self-hosted cache server · MIT-licensed · security patches and -fips image included
Read 3 Oct 2026 · fosterstack.com
Team
Multi-user access control · SSO (OIDC) · per-project usage analytics · email support (1-business-day target)
Read 3 Oct 2026 · fosterstack.com
Business
Everything in Team · HA/replication · priority support with CVE-response target · described, not yet available
Read 3 Oct 2026 · fosterstack.com
Compliance
Everything in Business · FIPS 140-3 applicability statement · signed per-release attestation letters · security-questionnaire support up to 8 hours per year (async)
Read 3 Oct 2026 · fosterstack.com
On the record
- Authentication
- It supports HTTP Basic Auth over TLS, with constant-time credential comparison and no credential logging.fosterstack.com · read 3 Oct 2026
- Build tools
- It supports Gradle and implements the Apache Maven Build Cache Extension remote HTTP mode, with Maven acceptance coverage in progress.fosterstack.com · read 3 Oct 2026
- Cache management
- The server provides size-capped LRU eviction to make room for new entries.fosterstack.com · read 3 Oct 2026
- Compliance
- FosterStack says it is not FedRAMP or CMMC compliant; its published evidence and validated crypto are intended to support a customer's compliance program.fosterstack.com · read 3 Oct 2026
- Deployment
- The product is self-hosted and can be run from a Docker image or as a static binary.github.com · read 3 Oct 2026
- Intended users
- The product is aimed at teams using Gradle or Maven that want a self-hosted replacement for the discontinued standalone Develocity Build Cache Node.github.com · read 3 Oct 2026
- Maturity
- The maker identifies the product as v0.1 and says nobody outside its own work is yet running it in a production build pipeline.fosterstack.com · read 3 Oct 2026
- Metrics
- It exposes Prometheus metrics and provides a read-only status page with hit rates and cache size versus cap.fosterstack.com · read 3 Oct 2026
- Operating systems
- Release binaries are available for Linux amd64 and arm64 and macOS amd64 and arm64; Windows is not built or planned.github.com · read 3 Oct 2026
- Privacy
- The maker says the free core makes no outbound connections and collects no telemetry or usage data.fosterstack.com · read 3 Oct 2026
- Product
- FosterStack is a self-hosted remote build cache server intended as a replacement for Develocity Build Cache Node.fosterstack.com · read 3 Oct 2026
- Security
- The core is MIT-licensed, releases include signed artifacts and SLSA provenance, and security patches are included in the free tier.fosterstack.com · read 3 Oct 2026
- Support
- Bugs and questions can be reported through GitHub issues; the listed paid tiers describe email and priority support but are not yet available.fosterstack.com · read 3 Oct 2026
