Source: https://seerepo.com/compare/juspay/hyperswitch/vs/stalwartlabs/stalwart
Markdown source: https://seerepo.com/compare/juspay/hyperswitch/vs/stalwartlabs/stalwart.md
Description: hyperswitch and stalwart share 10 technologies: rdkafka, Redis, Kafka, Tokio, jsonwebtoken, argon2, hkdf, totp-rs, quick-xml, and infer. Both are written in Rust.

# hyperswitch vs stalwart

hyperswitch and stalwart share 10 technologies: rdkafka, Redis, Kafka, Tokio, jsonwebtoken, argon2, hkdf, totp-rs, quick-xml, and infer. Both are written in Rust.

- [juspay/hyperswitch](https://seerepo.com/r/juspay/hyperswitch): Open source, composable payments platform | PCI compliant | SaaS and Self-host options | Enables connectivity to multiple payment, payout, fraud, vault and tokenization providers | Uplifts authorization with intelligent routing and revenue recovery | Reduce payment processing costs with cost observability | Reduces payment ops with reconciliation
- [stalwartlabs/stalwart](https://seerepo.com/r/stalwartlabs/stalwart): All-in-one Mail & Collaboration server. Secure, scalable and fluent in every protocol (IMAP, JMAP, SMTP, CalDAV, CardDAV, WebDAV).

## What they share and what sets them apart

- In common: rdkafka, Redis, Kafka, Tokio, jsonwebtoken, argon2, hkdf, totp-rs, quick-xml, infer
- Only in hyperswitch: Actix Web, aws-sdk-s3, sqlx-postgres, Postgres, moka, sqlx, actix-http, actix-rt, diesel, diesel_migrations, aws-sdk-sts, openidconnect, csv, tera, image, html-escape, lettre, qrcode, roxmltree, validator, tracing, tracing-futures, tracing-actix-web, tracing-subscriber, tracing-appender, aws-sdk-lambda, OpenTelemetry, opentelemetry-otlp, tracing-opentelemetry
- Only in stalwart: deadpool-postgres, mysql_async, rusqlite, tokio-postgres, rocksdb, quick_cache, async-nats, r2d2, azure_storage_blob, ldap3, azure_identity, pbkdf2, pwhash, scrypt, jieba-rs, imagesize, mail-parser, mail-builder, zip, azure_core, sd-notify

## Side by side

| | hyperswitch | stalwart |
|---|---|---|
| Size | 1,412,558 lines written, 2,133 code files | 637,196 lines written, 1,585 code files |
| Who writes it | 3.3% of its commits signed by AI. With Claude Code and GitHub Copilot | 0% of its commits signed by AI |
| Activity | Last push November 6, 2026, 8,315 commits, 45,715 stars | Last push November 4, 2026, 1,836 commits, 15,779 stars |
| Tests | 2,624 test files. 0.7% of its code files have a test that imports them | 38 test files. 1.4% 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, hyperswitch or stalwart?

hyperswitch, with 1,412,558 lines written; stalwart has 637,196.

The proof: [juspay/hyperswitch's code at commit 0446d56](https://github.com/juspay/hyperswitch/tree/0446d56c4f1959b863e99494de828c0582b03ec3)

### Which has more GitHub stars, hyperswitch or stalwart?

hyperswitch, with 45,715 stars; stalwart has 15,779.

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

### Which has more tests, hyperswitch or stalwart?

hyperswitch, with 2,624 test files; stalwart has 38.

The proof: [juspay/hyperswitch's code at commit 0446d56](https://github.com/juspay/hyperswitch/tree/0446d56c4f1959b863e99494de828c0582b03ec3)

### Which was updated more recently, hyperswitch or stalwart?

hyperswitch: its last push was on November 6, 2026, and stalwart's on November 4, 2026.

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

### Which has more commits signed by AI, hyperswitch or stalwart?

hyperswitch: an AI signed 3.3% of its commits, with Claude Code and GitHub Copilot.

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

## Sources

- juspay/hyperswitch: Read on November 6, 2026, at commit 0446d56 (https://github.com/juspay/hyperswitch/tree/0446d56c4f1959b863e99494de828c0582b03ec3)
- stalwartlabs/stalwart: Read on November 7, 2026, at commit 8b32686 (https://github.com/stalwartlabs/stalwart/tree/8b32686532d34623e9ce8e1237cf2bed9554af38)

## 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.