Source: https://seerepo.com/compare/reacherhq/check-if-email-exists/vs/vectordotdev/vector
Markdown source: https://seerepo.com/compare/reacherhq/check-if-email-exists/vs/vectordotdev/vector.md
Description: check-if-email-exists and vector share 7 technologies: sqlx, warp, Tokio, csv, log, tracing, and tracing-subscriber. Both are written in Rust.

# check-if-email-exists vs vector

check-if-email-exists and vector share 7 technologies: sqlx, warp, Tokio, csv, log, tracing, and tracing-subscriber. Both are written in Rust.

- [reacherhq/check-if-email-exists](https://seerepo.com/r/reacherhq/check-if-email-exists): Check if an email address exists without sending any email, written in Rust. Comes with a ⚙️ HTTP backend.
- [vectordotdev/vector](https://seerepo.com/r/vectordotdev/vector): A high-performance observability data pipeline.

## What they share and what sets them apart

- In common: sqlx, warp, Tokio, csv, log, tracing, tracing-subscriber
- Only in check-if-email-exists: lapin, Sentry, tokio-executor-trait, tokio-reactor-trait, lambda_runtime
- Only in vector: axum, aws-sdk-s3, sqlx-postgres, tokio-postgres, Redis, lru, MongoDB, aws-sdk-kinesis, opendal, Postgres, Kafka, AWS S3, tower, Tailwind CSS, crossterm, Ratatui, indicatif, aws-sdk-sts, azure_identity, parquet, quick-xml, handlebars, jsonschema, metrics, azure_core, tracing-core, aws-sdk-iam

## Side by side

| | check-if-email-exists | vector |
|---|---|---|
| Size | 8,417 lines written, 64 code files | 472,373 lines written, 1,238 code files |
| Who writes it | 1.1% of its commits signed by AI. With Claude Code and GitHub Copilot | 0.9% of its commits signed by AI. With Claude Code, Cursor, and GitHub Copilot |
| Activity | Last push November 9, 2026, 1,423 commits, 10,478 stars | Last push November 4, 2026, 14,656 commits, 22,799 stars |
| Tests | 1 test files | 242 test files. 28% 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, check-if-email-exists or vector?

vector, with 472,373 lines written; check-if-email-exists has 8,417.

The proof: [vectordotdev/vector's code at commit 1bac1b8](https://github.com/vectordotdev/vector/tree/1bac1b840fd5071a35cb8a1c66a857c3a555c9ca)

### Which has more GitHub stars, check-if-email-exists or vector?

vector, with 22,799 stars; check-if-email-exists has 10,478.

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

### Which has more tests, check-if-email-exists or vector?

vector, with 242 test files; check-if-email-exists has 1.

The proof: [vectordotdev/vector's code at commit 1bac1b8](https://github.com/vectordotdev/vector/tree/1bac1b840fd5071a35cb8a1c66a857c3a555c9ca)

### Which was updated more recently, check-if-email-exists or vector?

check-if-email-exists: its last push was on November 9, 2026, and vector's on November 4, 2026.

The proof: [reacherhq/check-if-email-exists's commits on GitHub](https://github.com/reacherhq/check-if-email-exists/commits)

### Which has more commits signed by AI, check-if-email-exists or vector?

check-if-email-exists: an AI signed 1.1% of its commits, with Claude Code and GitHub Copilot; in vector, 0.9%.

## Sources

- reacherhq/check-if-email-exists: Read on November 13, 2026, at commit d548bb4 (https://github.com/reacherhq/check-if-email-exists/tree/d548bb495d9c2de6edb22f8ea83c63ea54f4cdf4)
- vectordotdev/vector: Read on November 4, 2026, at commit 1bac1b8 (https://github.com/vectordotdev/vector/tree/1bac1b840fd5071a35cb8a1c66a857c3a555c9ca)

## 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.