
MongoDB
ArangoDB
Apache Cassandra
CouchBase
memcached
OrientDB
neo4j
Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.

Substack
Formo.so
Advanced analytics for Substack writers. Runs 100% locally, no cloud, no subscription. Discover your superfans, churn risk, and cohort retention.
Which is more popular?
Based on our record, Redis seems to be a lot more popular than StackStats.app. While we know about 242 links to Redis, we've tracked only 1 mention of StackStats.app.
Website, pricing, platforms and company facts side by side.
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| Website | redis.io | stackstats.app |
| Pricing | ||
| Company | — | Startup from the United Arab Emirates · 1 - 9 employees · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache and message broker. It supports data structures such as strings, hashes, lists, sets, sorted sets with range queries, bitmaps, hyperloglogs, geospatial indexes with radius queries and streams. Redis...
StackStats is a local desktop app for serious Substack writers. Import your CSV exports and get analytics Substack doesn't show you: bot-filtered open rates, cohort retention, dead subscriber detection, superfan ID, content-to-growth correlation, and an optional AI layer (supports Ollama,...
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


No analysis of Redis yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Improve your Redis developer experience with RedisInsight, Redis Labs
More videos
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Redis and StackStats.app.
StackStats.app's answer:
I built StackStats because Substack's native analytics weren't cutting it. I wanted cohort data, real open rates (not bot-inflated), and a way to identify which posts were actually driving subscriber growth — but every tool I found was either cloud-based or required migrating off Substack entirely. So I built a local app that works with Substack's own CSV exports. No migration, no cloud, no subscription.
StackStats.app's answer:
StackStats runs 100% locally on your machine — your subscriber data never touches a server. It also goes far beyond what Substack shows natively: bot-filtered open rates, cohort retention, superfan identification, dead subscriber detection, and content-to-growth correlation. No subscription, no account, no cloud. Pay once, own it forever.
StackStats.app's answer:
Most newsletter analytics tools are cloud-based SaaS with monthly subscriptions. StackStats is a one-time purchase that runs entirely on your device. For Substack writers who care about privacy — especially those with paid subscribers — that's a meaningful difference. You also get analytics features that don't exist anywhere else, like bot-filtered open rates and cohort retention, without having to migrate away from Substack.
StackStats.app's answer:
Serious Substack writers who are frustrated by Substack's shallow native analytics and want real data to drive growth — without moving their subscriber data to the cloud.
StackStats.app's answer:
Electron (macOS + Windows), HTML/CSS/JavaScript, Chart.js, PapaParse. Optional AI layer supports Ollama, Claude, GPT-4, Gemini, Groq, and OpenRouter. Licensing via Cloudflare Workers + D1. Payments via Gumroad.
Share your experience with using Redis and StackStats.app. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Redis is an exceptionally fast in-memory data store that is known for its speed and versatility. It supports a broad range of use cases, including caching, real-time analytics, and pub/sub messaging, which makes it a...
Redis is an open-source, in-memory data store used as a database, cache, and message broker for high-performance applications.
Redis offers a RESTful API for accessing data stored within its in-memory technology data structures. This API provides a simple and efficient way to interact with Redis, enabling developers to leverage its...
We have no reviews of StackStats.app yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Our data-plane choices are boring on purpose: Postgres, Redis, and S3-compatible object storage. Boring is a feature when the interesting question is whether yesterday's Actor still runs tomorrow. - Source: dev.to / 8 days ago
Redis is commonly used as an in-memory data store and cache. - Source: dev.to / 8 days ago
We chose Postgres and Redis, so we need both running. The app itself runs with Go on your machine, not inside Docker, because restarts are faster that way. Docker runs only the two services. - Source: dev.to / 11 days ago
I'm working on 3 products now: 1. FormBeep(https://formbeep.com) at $38 MRR now - A form to Whatsapp tool. Stack is mainly CF workers with Clerk Auth. 2. SlashLink(https://slashlink.app) $0 - A simple pay as you go amazon link localizer.... - Source: Hacker News / 5 days ago
When comparing Redis and StackStats.app, you can also consider the following products.

MongoDB (from "humongous") is a scalable, high-performance NoSQL database.
Compare MongoDB to Redis or StackStats.app:

With Substack, anyone can start a publication that combines a personal website, blog, and email newsletter or podcast. It's quick and simple.
Compare Substack to Redis or StackStats.app:

A distributed open-source database with a flexible data model for documents, graphs, and key-values.
Compare ArangoDB to Redis or StackStats.app:


The Apache Cassandra database is the right choice when you need scalability and high availability without compromising performance.
Compare Apache Cassandra to Redis or StackStats.app:
