---
title: "redis vs reindexer"
type: "comparison"
canonical_url: "https://www.graphcanon.com/compare/redis-redis-vs-restream-reindexer"
tools: ["redis-redis", "restream-reindexer"]
---

# redis vs reindexer

*GraphCanon updated Aug 23, 2026*

## Verdict

Pick redis if redis is an in-memory database designed as a versatile cache and data structure store with advanced features such as JSON operations and vector searches, making it suitable for real-time applications; pick reindexer if reindexer is an embeddable and in-memory document-oriented database designed for rapid vector search and similarity evaluation using a high-level query builder interface.

[redis](http://redis.io) reports 76k GitHub stars, 25k forks, and 2.9k open issues, last pushed Aug 20, 2026. [reindexer](https://reindexer.io) has 810 stars, 61 forks, and 19 open issues, last pushed Aug 23, 2026. Figures are from public GitHub metadata via [redis's repository](https://github.com/redis/redis) and [reindexer's repository](https://github.com/Restream/reindexer).

| | [redis](/tools/redis-redis.md) | [reindexer](/tools/restream-reindexer.md) |
| --- | --- | --- |
| Tagline | Redis is a preferred cache, data structure server, and document & vector query engine for real-time applications. | Embeddable, in-memory, document-oriented database with a high-level Query builder interface. |
| Stars | 76,078 | 810 |
| Forks | 24,759 | 61 |
| Open issues | 2,905 | 19 |
| Language | C | C++ |
| Adopt for | Redis is an in-memory database designed as a versatile cache and data structure store with advanced features such as JSON operations and vector searches, making it suitable for real-time applications. | Reindexer is an embeddable and in-memory document-oriented database designed for rapid vector search and similarity evaluation using a high-level query builder interface. |
| Persona | - | - |
| Runtime | - | - |
| License | Other | Apache-2.0 |
| Categories | Data & Retrieval, Vector Databases | Data & Retrieval, Vector Databases |

## Trust and health

_Sourced signals - not a safety guarantee. No winner column._

| | [redis](/tools/redis-redis.md) | [reindexer](/tools/restream-reindexer.md) |
| --- | --- | --- |
| Days since push | 2d | 0d |
| Open issues (now) | 2.9k | 19 |
| Stars delta | +451 (30d) | +4 (30d) |
| Open issues delta | +22 (30d) | -3 (30d) |
| Full report | [trust report](/tools/redis-redis/trust.md) | [trust report](/tools/restream-reindexer/trust.md) |

## Decision facts: redis

- **Adopt for:** Redis is an in-memory database designed as a versatile cache and data structure store with advanced features such as JSON operations and vector searches, making it suitable for real-time applications.

## Decision facts: reindexer

- **Hosting:** self hosted - Reindexer functions as a self-hosted solution integrated into applications
- **Pricing:** freemium - As an open-source tool under the Apache-2.0 license, Reindexer is freely available without licensing fees.
- **Requirements:** Min 1 GB RAM; It is optimized for in-memory operations, so available memory directly impacts performance.
- **Adopt for:** Reindexer is an embeddable and in-memory document-oriented database designed for rapid vector search and similarity evaluation using a high-level query builder interface.

## Choose when

### Choose redis if…

- redis is primarily C; reindexer is C++.
- License: redis is Other, reindexer is Apache-2.0.
- Tags unique to redis: cache, caching, database, json.
- You need high-speed access to frequently used data due to Redis's in-memory nature.

### Choose reindexer if…

- reindexer is primarily C++; redis is C.
- License: reindexer is Apache-2.0, redis is Other.
- Reindexer functions as a self-hosted solution integrated into applications
- Pricing: As an open-source tool under the Apache-2.0 license, Reindexer is freely available without licensing fees..
- Requirements: Min 1 GB RAM; It is optimized for in-memory operations, so available memory directly impacts performance..
- Tags unique to reindexer: ann-search, cpp-library, document-oriented-database, embedable.
- When you need advanced vector search capabilities with fast performance as Reindexer specializes in efficient vector searches.

## When NOT to use redis

- Your project has limited memory resources since Redis relies on in-memory storage, which could lead to high costs or operational challenges with large datasets.
- You prioritize persistence over speed; while Redis offers persistence options, its primary design is for real-time access and not robust disk-based backup solutions like traditional SQL databases.
- Your application workload does not benefit from the fast read/write capabilities and rich data structure support offered by Redis, possibly implying that a less specialized database would suffice.

## When NOT to use reindexer

- When the requirement is for a distributed database system; Reindexer operates as an embeddable solution and does not support distributed configurations out-of-the-box.
- If your project strictly avoids C++ libraries due to team expertise or environmental restrictions, since Reindexer is primarily developed in C++.

## Common questions

### What is the difference between redis and reindexer?

redis: Redis is a preferred cache, data structure server, and document & vector query engine for real-time applications.. reindexer: Embeddable, in-memory, document-oriented database with a high-level Query builder interface.. See the comparison table for live GitHub stats and shared categories.

### When should I choose redis over reindexer?

Choose redis over reindexer when redis is primarily C; reindexer is C++; License: redis is Other, reindexer is Apache-2.0; Tags unique to redis: cache, caching, database, json; You need high-speed access to frequently used data due to Redis's in-memory nature.

### When should I choose reindexer over redis?

Choose reindexer over redis when reindexer is primarily C++; redis is C; License: reindexer is Apache-2.0, redis is Other; Reindexer functions as a self-hosted solution integrated into applications; Pricing: As an open-source tool under the Apache-2.0 license, Reindexer is freely available without licensing fees.; Requirements: Min 1 GB RAM; It is optimized for in-memory operations, so available memory directly impacts performance.; Tags unique to reindexer: ann-search, cpp-library, document-oriented-database, embedable; When you need advanced vector search capabilities with fast performance as Reindexer specializes in efficient vector searches.

### When should I avoid redis?

Your project has limited memory resources since Redis relies on in-memory storage, which could lead to high costs or operational challenges with large datasets. You prioritize persistence over speed; while Redis offers persistence options, its primary design is for real-time access and not robust disk-based backup solutions like traditional SQL databases. Your application workload does not benefit from the fast read/write capabilities and rich data structure support offered by Redis, possibly implying that a less specialized database would suffice.

### When should I avoid reindexer?

When the requirement is for a distributed database system; Reindexer operates as an embeddable solution and does not support distributed configurations out-of-the-box. If your project strictly avoids C++ libraries due to team expertise or environmental restrictions, since Reindexer is primarily developed in C++.

### Is redis or reindexer more popular on GitHub?

redis has more GitHub stars (76,078 vs 810). Stars measure visibility, not whether either tool fits your constraints.

### Are redis and reindexer open source?

Yes - both are open-source projects on GitHub (redis: Other, reindexer: Apache-2.0).

### Where can I find alternatives to redis or reindexer?

GraphCanon lists graph-backed alternatives at [redis alternatives](/tools/redis-redis/alternatives) and [reindexer alternatives](/tools/restream-reindexer/alternatives) ([redis markdown twin](/tools/redis-redis/alternatives.md), [reindexer markdown twin](/tools/restream-reindexer/alternatives.md)), ranked by typed relationship edges rather than popularity votes.

### Is there a machine-readable version of this comparison?

Yes. The markdown twin at [this comparison](/compare/redis-redis-vs-restream-reindexer.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers.

### Which is better maintained, redis or reindexer?

redis: Very active. reindexer: Very active. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance.

### Where are the full trust reports for redis and reindexer?

GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [redis trust report](/tools/redis-redis/trust); [reindexer trust report](/tools/restream-reindexer/trust).

---

**Machine-readable endpoints**

- JSON: [`/api/graphcanon/graph?tool=redis-redis`](/api/graphcanon/graph?tool=redis-redis)
- LLM index: [/llms.txt](/llms.txt)
- Full corpus: [/llms-full.txt](/llms-full.txt)

_GraphCanon - The knowledge graph for AI development. https://www.graphcanon.com/_