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Comparison · DevOps
Rivet vs Tigris
A side-by-side editorial comparison of Rivet and Tigris — release velocity, themes, recent moves, and the top alternatives to consider.
Rivet vs Tigris: at a glance
| Feature | Rivet | Tigris |
|---|---|---|
| Sector | DevOps | DevOps |
| Velocity score | 7.5 | 5.0 |
| Sparks · 30d | 3 | 0 |
| Top themes | actors, ai agents, sqlite, forking | object-storage, foundationdb, geo-replication, s3-compatibility |
| Last editorial update | 2d ago | 2mo ago |
| Website | — | — |
What is Rivet?
Rivet Actors can now fork in 20 ms, SQLite database included, without copying data.
Rivet builds infrastructure for long-lived actors and AI agents: BYOC, OpenTelemetry tracing, actor-scoped JWTs and agentOS Hosted VMs. The 3.0 Preview made Rivet a single stateless binary on S3, and the Rust SDK reached general availability on 6 November. On 11 November Rivet added actor forking: a fork starts in 20 ms with the original actor's state and SQLite database and costs nothing until it writes.
What is Tigris?
Tigris keeps publishing its architecture, and the newest post opens up the storage engine itself.
This feed is Tigris's engineering blog, and it alternates between protocol critique and descriptions of how the product answers it. The most recent post opens the internals: how Tigris composes ACID metadata, global placement, caching, replication, and background work on FoundationDB into a multi-region object store. Before it came the Recycle Bin — deletion of objects and buckets on top of immutable storage in an active-active geo-replicated database — plus two posts dissecting SigV4 and presigned URLs, and one on agent-native onboarding through tigris init --agent.
Rivet vs Tigris: editorial side-by-side
Rivet
7.5DEVOPS
Rivet Actors can now fork in 20 ms, SQLite database included, without copying data.
◆ Current state
Rivet builds infrastructure for long-lived actors and AI agents: BYOC, OpenTelemetry tracing, actor-scoped JWTs and agentOS Hosted VMs. The 3.0 Preview made Rivet a single stateless binary on S3, and the Rust SDK reached general availability on 6 November. On 11 November Rivet added actor forking: a fork starts in 20 ms with the original actor's state and SQLite database and costs nothing until it writes.
◆ Where it's heading
Rivet keeps turning its S3-backed storage engine into features for agent workloads. Copy-on-write forking follows from the 3.0 storage design and gives agents a cheap way to branch a session, try something and discard it. The SDK and auth work of the past two months points to Rivet positioning actors as the runtime for agent backends.
◆ Prediction
Forking is likely to show up next in agentOS and the Pi integrations as a way to branch agent runs; the entries do not say when 3.0 leaves preview.
Tigris
5.0DEVOPS
Tigris keeps publishing its architecture, and the newest post opens up the storage engine itself.
◆ Current state
This feed is Tigris's engineering blog, and it alternates between protocol critique and descriptions of how the product answers it. The most recent post opens the internals: how Tigris composes ACID metadata, global placement, caching, replication, and background work on FoundationDB into a multi-region object store. Before it came the Recycle Bin — deletion of objects and buckets on top of immutable storage in an active-active geo-replicated database — plus two posts dissecting SigV4 and presigned URLs, and one on agent-native onboarding through tigris init --agent.
◆ Where it's heading
The writing is doing product work. Each protocol post establishes a problem — SigV4's canonicalization and clock skew, presigned URLs as deliberate replay attacks, S3 egress pricing on ClickHouse restores — and positions Tigris behavior as the answer, which makes the blog a migration funnel rather than a changelog. The architecture post is a different move: publishing the FoundationDB composition is a credibility play aimed at buyers who need to believe a newer object store can hold multi-region data.
◆ Prediction
Expect the protocol-critique-then-Tigris-answer format to continue, with the egress-cost framing recurring as the clearest paid migration path. Feature announcements will likely stay embedded in essays rather than appearing as release notes.
Alternatives to Rivet and Tigris
Other DevOps products tracked by Sparkpulse, ranked by recent ship velocity. Each card links to a full editorial trajectory and lets you pivot into a head-to-head comparison with either Rivet or Tigris.
Appsmith
Appsmith 2.7 makes its MCP agent ask before deleting widgets and blocks stale edits.
Apache Arrow Rust
Arrow Rust cuts release candidates on three older lines at once.
Sanity
Sanity's MCP server now explains failed validations and stops skipping them.
GitHub
GitHub sets a December 8 cutoff for ARM32 Actions runners and opens AI Scan to the API.
Manticore Search
Manticore keeps patching 31.x, now fixing a FREEZE crash and a DocID ordering bug.
See all Rivet alternatives → · See all Tigris alternatives →
Recent activity from Rivet and Tigris
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 2d agoRivetIntroducing OpenOrange: Run Cloudflare Workers Anywhere ⚡
- 3d agoRivetIntroducing Actor Forking for SQLite ⚡
- 8d agoRivetRust SDK for Rivet Actors Is Now Generally Available
- 19d agoRivetIntroducing Rivet 3.0 Preview ⚡
- 1mo agoRivetIntroducing agentOS 0.4 & Hosted VMs
- 1mo agoRivetIntroducing Pi Durable for Rivet
- 2mo agoTigrisBuilding a global object store on FoundationDB
- 3mo agoTigrisExtending immutability: deletion without losing data
- 3mo agoTigrisSigV4 authentication is surprisingly complicated
- 3mo agoTigrisHumans don't install software themselves anymore, their agents do
- 4mo agoTigrisThe Most Expensive ClickHouse Query Is the Restore
- 4mo agoTigrisPresigned URLs are technically a security vuln
Frequently asked questions
What is the difference between Rivet and Tigris?
They serve adjacent needs but don't currently overlap on shipped themes. Rivet is currently shipping more aggressively (velocity 7.5 vs 5.0), with 3 editorial sparks in the last 30 days against 0. See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is Rivet better than Tigris?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Rivet is currently shipping more aggressively (velocity 7.5 vs 5.0), with 3 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other DevOps products to evaluate alongside.
What are the best alternatives to Rivet?
Top Rivet alternatives in DevOps are ranked by recent ship velocity. Browse the "Rivet alternatives" section above for the current picks, or visit /alternatives/rivet for the full list with editorial commentary on each.
What are the best alternatives to Tigris?
Top Tigris alternatives in DevOps are ranked by recent ship velocity. Browse the "Tigris alternatives" section above for the current picks, or visit /alternatives/tigris for the full list with editorial commentary on each.