Object storage
StorageDisposable S3-compatible buckets.
ValidatedFloor 64 MB
Services
16 of 16 listed services have been validated, with memory floors measured on 2026-10-28.
What is in the catalogue?
A floor is the smallest memory at which the service booted and passed its own checks. It is not a sizing recommendation. Each service name links to its evidence.
Pill: how far the service has been tested. Bar: smallest memory it ran in (32 to 128 MB scale).
Key-value store
DatabasePer-service JSON KV over HTTPS with expiring keys.
ValidatedFloor 64 MB
SurrealDB
DatabaseMulti-model database, one instance and volume per service.
ValidatedFloor 96 MB
libSQL
DatabaseSQLite-compatible database server.
ValidatedFloor 64 MB
Analytical SQL
DatabaseDuckDB served over HTTP for analytical queries.
ValidatedFloor 128 MB
Lakehouse tables
DatabaseDuckLake catalogue with Parquet data files.
ValidatedFloor 128 MB
Messaging
MessagingNATS with JetStream persistence over TLS and WebSocket.
ValidatedFloor 64 MB
Search
SearchFull-text search with typo tolerance.
ValidatedFloor 96 MB
Mail inbox
Mail and notificationsIMAP test inbox for programmatic mail checks.
ValidatedFloor 64 MB
Push relay
Mail and notificationsSingle-tenant push API for APNs and FCM.
ValidatedFloor 64 MB
Web server
GatewaysStatic files and reverse proxy.
ValidatedFloor 64 MB
API gateway
GatewaysRequest routing, JWT checks and CORS in front of your backends.
ValidatedFloor 96 MB
Edge proxy
GatewaysSmall reverse proxy.
ValidatedFloor 64 MB
Webhook capture
ToolingInspect, replay and fault-inject incoming webhooks.
ValidatedFloor 64 MB
Status monitoring
ToolingAvailability checks for your endpoints.
ValidatedFloor 64 MB
Container registry
ToolingDisposable OCI registry.
ValidatedFloor 96 MB
How do the floors compare?
| Service | Engine | Floor | Status | Notes |
|---|---|---|---|---|
| Object storage Storage | s3s (Rust), filesystem backed | 64 MB | Validated | Single-tenant, TLS only. |
| Key-value store Database | redb (Rust) | 64 MB | Validated | Crash-tested: 3,535 of 3,535 acknowledged writes survived 10 forced stops. |
| SurrealDB Database | SurrealDB 3 (SurrealKV) | 96 MB | Validated | Heavier writes and queries were not probed at the floor; budget more for real use. |
| libSQL Database | sqld (libSQL) | 64 MB | Validated | Floor was probed once. |
| Analytical SQL Database | DuckDB with the Quack extension | 128 MB | Validated | Server-side loads fit the floor; clients that upload bulk data need more memory. The gateway rejects request bodies above about 8 MB. |
| Lakehouse tables Database | DuckLake on DuckDB | 128 MB | Validated | Single writer. Below 128 MB the VM panics under larger queries. |
| Messaging Messaging | NATS 2.15 | 64 MB | Validated | Small-workload floor. Use 128 MB or more for real traffic. |
| Search Search | Meilisearch 1.56 | 96 MB | Validated | Indexing needs more memory than serving queries alone; see the evidence. |
| Mail inbox Mail and notifications | Rust IMAP server | 64 MB | Validated | Public inbound mail on port 25 is not supported on this platform. |
| Push relay Mail and notifications | Go, standard library only | 64 MB | Validated | Tested against mocks only; real APNs and FCM delivery is not verified. |
| Web server Gateways | Caddy | 64 MB | Validated | The platform gateway terminates TLS in front of it. |
| API gateway Gateways | KrakenD CE 3 | 96 MB | Validated | Lower sizes booted intermittently; the published figure is the reliable one. |
| Edge proxy Gateways | Pingap (Rust) | 64 MB | Validated | Needs more memory under concurrent load; see the evidence. |
| Webhook capture Tooling | webhookd (Rust) | 64 MB | Validated | Needs one 50 MB storage chunk. |
| Status monitoring Tooling | statusd (Rust) | 64 MB | Validated | Checks HTTP, TCP, DNS and TLS and keeps latency history. |
| Container registry Tooling | Zot | 96 MB | Validated | Pushes and pulls of images, including a 50 MB layer. |
Where do these numbers come from?
Floors were probed on the production microVM runtime on 2026-10-28 by running each product's own test suite at decreasing memory sizes. Each figure comes from a single probe series. Read how we measure, or see what a memory floor is.
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