letsencrypt / boulder
An ACME-based certificate authority, written in Go.
- Stars
- 5,789 stars
- Forks
- 650 forks
- Language
- Go
- License
- MPL-2.0
- Created
- Dec 21, 2014
- Last push
- Nov 11, 2026
- Updated
- Nov 11, 2026
Why these Tags: an agent read the README and quoted it
- TLS certificate tool from the description:
An ACME-based certificate authority, written in Go.
An agent gave these Tags from the fixed Tag list in the AwesomeRepos source code. A code check kept each Tag only when its quote is in the text. A wrong Tag? Report an error with the form at the end of this page.
Admitted to the Repository Index on Nov 10, 2026: 5,787 stars on 2026-11-10.
Star History
188 days recorded, May 8, 2026 – Nov 11, 2026 (UTC). Net change +119 stars.
The star count of each day is the latest count minus the net stars of the later days.
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Star History chart
[](https://awesomerepos.com/letsencrypt/boulder) Badge
[](https://awesomerepos.com/letsencrypt/boulder) Timeline
It gained stars on 80 of the 188 days recorded since May 8, 2026.
Its largest 7 days were Oct 20, 2026 to Oct 26, 2026: 13 stars.
In the 30 days to Nov 11, 2026 it got 32 stars, 39% more than in the 30 days before.
It had 5,670 stars before May 8, 2026 and has 5,789 stars now: 4,211 fewer than 10,000.
- Created on the Repository Host
- Largest star day recorded: +3 stars
- +3 stars in one day
- +3 stars in one day
- Release v0.20261020.1
- Release v0.20261020.0
- Release v0.20261027.0
- Release v0.20261105.0
- Entered the Repository Index: 5,787 stars on 2026-11-10
- Release v0.20261110.0
- Latest push
The timeline comes from the creation date and the releases on the Repository Host, the Admission, the Star History, and the Observations. Star milestones show only when the Star History records the day. The list shows up to 5 stable releases from the latest 10 releases recorded. When none of them is stable, one item counts the pre-releases. On the chart of net stars each day, a solid line marks each recorded release.
Forks and pushes
From 2 Observations, Nov 11, 2026 – Nov 12, 2026. Forks -1. AwesomeRepos saw a new push on 1 of 1 days.
- Nov 12, 2026: new push
A filled day: the last push time changed since the Observation before it.
Health facts
Measured facts in four separate dimensions, each with a date and a source. AwesomeRepos does not add them into one score. AwesomeRepos reads the weekly commits, the changelog, and the community files each week for the 5,000 visible repositories with the most stars and for each rising repository. How AwesomeRepos defines each check
Maintenance
2 of 4 checks (2 without data)-
Yes: Not archived
GitHub does not mark the repository as archived. Source
-
Yes: A push in the last 90 days
Last push on 2026-11-11, 0 days ago. Source
-
No data: Commits in the last 13 weeks
No data: AwesomeRepos has not read the weekly commits.
-
No data: Commits in 26 or more of the last 52 weeks
No data: AwesomeRepos has not read the weekly commits.
Releases
2 of 3 checks (1 without data)-
Yes: A release in the last 365 days
Newest release v0.20261110.0 on 2026-11-10, 1 day ago. 10 or more releases in the last 365 days. Source
-
Yes: The newest release tag is a semantic version
The newest release tag is v0.20261110.0. Source
-
No data: A changelog file at the root
No data: AwesomeRepos has not scanned this repository.
Security practice
0 of 1 check (1 without data)-
No data: A security policy
No data: AwesomeRepos has not scanned this repository.
AwesomeRepos has not asked OpenSSF Scorecard about this repository.
Community files
1 of 3 checks (2 without data)-
Yes: A licence
GitHub finds the licence MPL-2.0. Source
-
No data: A contributing guide
No data: AwesomeRepos has not scanned this repository.
-
No data: A code of conduct
No data: AwesomeRepos has not scanned this repository.
Dependencies in the index
This section shows the packages that connect this repository to other repositories in the index.
The GitHub dependency graph of this repository names 54 direct packages (scanned on Nov 12, 2026). Packages from 19 other repositories in the index are among them.
5 scanned repositories name a package from this repository.
Uses (in the index) · 19
- psf/requests 55K
PyPI: requests
-
PyPI: pandas
- numpy/numpy 33K
PyPI: numpy
- certbot/certbot 33K
PyPI: acme
-
PyPI: matplotlib
- grpc/grpc-go 23K
Go: google.golang.org/grpc
- redis/go-redis 22K
Go: github.com/redis/go-redis/extra/redisotel/v9, github.com/redis/go-redis/v9
-
Go: github.com/go-sql-driver/mysql
-
Go: github.com/golang/groupcache
-
GitHub Actions: actions/checkout
Show all 19
- miekg/dns 8.8K
Go: github.com/miekg/dns
- pyca/cryptography 7.8K
PyPI: cryptography
-
Go: github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus
-
Go: go.opentelemetry.io/otel, go.opentelemetry.io/otel/trace
-
Go: github.com/prometheus/client_golang
-
GitHub Actions: actions/github-script
- aws/aws-sdk-go-v2 3.7K
Go: github.com/aws/aws-sdk-go-v2, github.com/aws/aws-sdk-go-v2/config, github.com/aws/aws-sdk-go-v2/service/s3
-
Go: github.com/pelletier/go-toml
- go-jose/go-jose 546
Go: github.com/go-jose/go-jose/v4
Used by (in the index) · 5
-
Go: github.com/letsencrypt/boulder
- lunasec-io/lunasec 1.5K
Go: github.com/letsencrypt/boulder
-
Go: github.com/letsencrypt/boulder
-
Go: github.com/letsencrypt/boulder
-
Go: github.com/letsencrypt/boulder
Sources: the GitHub dependency graph of each repository, and deps.dev for the source repository of each package (checked on Nov 3, 2026). A dependency graph also names development packages. deps.dev takes most source repositories from package metadata. How the dependency graph is made
Observations
Latest Observation, Nov 12, 2026: 5,789 stars, 650 forks, last push Nov 11, 2026, not archived. One of 2 Observations since Nov 11, 2026.