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Momento

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by Momento Inc. · since 2022 · also known as Momento Cache, Momento Topics

Managed Valkey and serverless cache/pub-sub from ex-DynamoDB engineers, plus self-hosted Valkey tooling.

key-valuemanaged serviceproprietarygrowing
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Overview

Momento launched in 2022 as an API-first serverless cache and Topics pub/sub service, priced per GB transferred with no clusters to size. Its offering has since shifted toward Valkey: managed dedicated Valkey in Flex and Cluster tiers, plus a Valkey router, Kubernetes operator and hardened Valkey images for self-hosted fleets. Founded by former AWS DynamoDB engineers, it targets media, gaming and fintech companies with spiky traffic. Pick it if you want someone else to run Valkey at large scale, or a cache you can call over gRPC without managing connections.

CachingPub/Sub messagingSession store

Strengths & trade-offs

Strengths

  • +No cluster sizing for the serverless cache and Topics
  • +Managed Valkey run by a team focused on cache performance
  • +Self-hosted Valkey operator and router for platform teams
  • +SDKs for web, mobile and backend, including browser pub/sub

Trade-offs

  • −Proprietary API for the serverless cache means some lock-in
  • −Not a durable store; data is cache-only
  • −Smaller vendor than the hyperscalers

Great for

  • +Caching for spiky media and live-event traffic
  • +Real-time pub/sub to browsers and mobile apps
  • +Outsourcing large Valkey fleet operations

Think twice for

  • −Durable primary data
  • −Teams that need on-prem only

Capabilities

Native or official first-party support · 4 of 25 tracked

✓TTL / expiry
✓Pub/Sub
✓In-memory
✓Role-based access
–Transactions
–Joins
–Secondary indexes
–Full-text search
–Vector search
–Geospatial
–JSON
–Change data capture
–Triggers
–Stored procedures
–Materialized views
–Columnar storage
–Durable persistence
–Compression
–Encryption at rest
–Time travel
–Branching
–Online schema changes
–Streaming ingest
–Offline sync
–Runs in WebAssembly

Scale & consistency

Comfortable data size
Large · ≤ 1 PB
Horizontal scaling
Native
Multi-region
No
Transactions
None
Consistency
Eventual
Schema
Schemaless
Architecture
Serverless, Distributed, In memory
Query languages
Momento SDK API, Redis commands (RESP)

Deployment

Self-hosted Vendor-managed cloud Serverless Embedded Edge Kubernetes operator

available on · AWS · Google Cloud

Ecosystem

compatible withRedis
apis & protocolsgRPC, HTTP, RESP
client languagesJavaScript, Python, Go, Java, C#, Rust, PHP, Ruby, Swift, Kotlin
used bySnap, Paramount, Coinbase

Alternatives to Momento

Compare all→
UpstashKey-Value20.4

Serverless, per-request-priced Redis with an HTTP API built for edge and serverless functions.

momento vs upstash →
Amazon ElastiCacheKey-Value29.1

AWS's managed Valkey, Redis OSS and Memcached service, provisioned or serverless.

momento vs amazon-elasticache →
ValkeyKey-Value58.0

The Linux Foundation's BSD-licensed fork of Redis, now the default engine on AWS and Google Cloud.

momento vs valkey →
RedisKey-Value84.3

The in-memory data structure server that became the default cache, now with search, JSON and vectors built in.

momento vs redis →
Google Cloud MemorystoreKey-Value5.6

Google Cloud's managed in-memory family: Valkey, Redis, Redis Cluster and Memcached.

momento vs google-memorystore →
MemcachedKey-Value50.6

The original multi-threaded, dead-simple distributed memory cache for key-value blobs.

momento vs memcached →

Momento FAQ

What is Momento?

Momento is a key-value database by Momento Inc., first released in 2022. Momento launched in 2022 as an API-first serverless cache and Topics pub/sub service, priced per GB transferred with no clusters to size. Its offering has since shifted toward Valkey: managed dedicated Valkey in Flex and Cluster tiers, plus a Valkey router, Kubernetes operator and hardened Valkey images for self-hosted fleets. Founded by former AWS DynamoDB engineers, it targets media, gaming and fintech companies with spiky traffic. Pick it if you want someone else to run Valkey at large scale, or a cache you can call over gRPC without managing connections.

Is Momento open source?

No. Momento is proprietary, closed-source software.

Does Momento support ACID transactions?

No. Momento does not provide ACID transactions; its consistency model is eventual.

Does Momento scale horizontally?

Momento scales horizontally out of the box, with built-in sharding or partitioning. It is comfortable at large scale (≤ 1 PB).

How can I run Momento?

You can self-host it, use the vendor's managed cloud and run it serverless. It is available on AWS and Google Cloud.

What is Momento best for?

Momento is a strong fit for caching for spiky media and live-event traffic; real-time pub/sub to browsers and mobile apps; and outsourcing large Valkey fleet operations. Think twice for durable primary data.

What are the best alternatives to Momento?

Common alternatives to Momento include Upstash, Amazon ElastiCache, Valkey, Redis and Google Cloud Memorystore. The right choice depends on your workload, scale and hosting; WhichDB's smart match ranks them against your requirements.

How popular is Momento?

Momento ranks #319 of 844 databases on the WhichDB Score (9.0/100), and #42 among key-value databases. The score combines public adoption signals such as package downloads, GitHub activity, job posts and developer discussion.