Source: https://seerepo.com/compare/App-vNext/Polly/vs/duplicati/duplicati
Markdown source: https://seerepo.com/compare/App-vNext/Polly/vs/duplicati/duplicati.md
Description: Polly and duplicati share 3 technologies: Microsoft.Extensions.Caching.Memory, Microsoft.Extensions.Logging.Console, and Microsoft.Extensions.Logging.Abstractions. Both are written in C#.

# Polly vs duplicati

Polly and duplicati share 3 technologies: Microsoft.Extensions.Caching.Memory, Microsoft.Extensions.Logging.Console, and Microsoft.Extensions.Logging.Abstractions. Both are written in C#.

- [App-vNext/Polly](https://seerepo.com/r/App-vNext/Polly): Polly is a .NET resilience and transient-fault-handling library that allows developers to express policies such as Retry, Circuit Breaker, Timeout, Bulkhead Isolation, and Fallback in a fluent and thread-safe manner. From version 6.0.1, Polly targets .NET Standard 1.1 and 2.0+.
- [duplicati/duplicati](https://seerepo.com/r/duplicati/duplicati): Store securely encrypted backups in the cloud!

## What they share and what sets them apart

- In common: Microsoft.Extensions.Caching.Memory, Microsoft.Extensions.Logging.Console, Microsoft.Extensions.Logging.Abstractions
- Only in Polly: System.ValueTuple, Microsoft.Extensions.Options, System.ComponentModel.Annotations, System.Diagnostics.DiagnosticSource
- Only in duplicati: ASP.NET Core, Microsoft.Data.Sqlite, SQLitePCLRaw.bundle_e_sqlite3, SQLite, Azure.Storage.Blobs, Google, Avalonia.Desktop, Avalonia, Avalonia.Themes.Fluent, Microsoft.Toolkit.Uwp.Notifications, Google.Apis.Auth, Otp.NET, System.Security.Principal.Windows, Microsoft.AspNetCore.Authentication.JwtBearer, Azure.Identity, System.IdentityModel.Tokens.Jwt, Handlebars.Net, MimeKit, MailKit, AWSSDK.Core, Microsoft.Extensions.Logging, System.Diagnostics.EventLog

## Side by side

| | Polly | duplicati |
|---|---|---|
| Size | 106,814 lines written, 379 code files | 420,918 lines written, 1,323 code files |
| Who writes it | 0.1% of its commits signed by AI. With GitHub Copilot | 3% of its commits signed by AI. With Claude Code, Codex, and GitHub Copilot |
| Activity | Last push November 7, 2026, 2,845 commits, 14,253 stars | Last push November 8, 2026, 11,923 commits, 15,189 stars |
| Tests | 325 test files. 81.5% of its code files have a test that imports them | 464 test files. 30.2% of its code files have a test that imports them |

- Size: Lines written by people and agents, without generated ones; code files, without tests.
- Who writes it: A commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
- Activity: From GitHub and its history, on the day SeeRepo read it.
- Tests: The files that test the code, and the share of code files a test imports.

## Frequently asked questions

### Which is bigger, Polly or duplicati?

duplicati, with 420,918 lines written; Polly has 106,814.

The proof: [duplicati/duplicati's code at commit e071887](https://github.com/duplicati/duplicati/tree/e07188704878da13f63ddbb22453908cd45957df)

### Which has more GitHub stars, Polly or duplicati?

duplicati, with 15,189 stars; Polly has 14,253.

The proof: [duplicati/duplicati on GitHub](https://github.com/duplicati/duplicati)

### Which has more tests, Polly or duplicati?

duplicati, with 464 test files; Polly has 325.

The proof: [duplicati/duplicati's code at commit e071887](https://github.com/duplicati/duplicati/tree/e07188704878da13f63ddbb22453908cd45957df)

### Which was updated more recently, Polly or duplicati?

duplicati: its last push was on November 8, 2026, and Polly's on November 7, 2026.

The proof: [duplicati/duplicati's commits on GitHub](https://github.com/duplicati/duplicati/commits)

### Which has more commits signed by AI, Polly or duplicati?

duplicati: an AI signed 3% of its commits, with Claude Code, Codex, and GitHub Copilot; in Polly, 0.1%.

The proof: [the commits each tool signed in duplicati/duplicati](https://seerepo.com/r/duplicati/duplicati/ai)

## Sources

- App-vNext/Polly: Read on November 9, 2026, at commit 8a37f64 (https://github.com/App-vNext/Polly/tree/8a37f641f631fae9c8fab243be45e576c306b9f7)
- duplicati/duplicati: Read on November 8, 2026, at commit e071887 (https://github.com/duplicati/duplicati/tree/e07188704878da13f63ddbb22453908cd45957df)

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.