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Comparison · DevOps
Convex vs QuestDB
A side-by-side editorial comparison of Convex and QuestDB — release velocity, themes, recent moves, and the top alternatives to consider.
Convex vs QuestDB: at a glance
What is Convex?
Convex raised $57M on the argument that agents need a backend built for them.
The feed is thin on releases and heavy on company milestones. A $57M Series B led by Insight Partners is the newest item, pitched around developers and their agents writing software together and needing a backend that keeps up. The substantive product news remains April's Convex for Enterprise, which added the compliance and scale posture the platform previously lacked; since then the feed carries a conference announcement and open-source recaps rather than shipped capability.
What is QuestDB?
QuestDB 10.0 collapses ingest and egress into one binary protocol, then aims at agent-run notebooks.
QuestDB just shipped 10.0, its first major version bump in the visible window, built around QWP — a binary columnar wire protocol that handles writes going in and streams Arrow back out through a single client. The release also carries live views in beta, notebooks driven by coding agents, and the storage groundwork that QuestDB Enterprise 4.0 builds cold storage on. The days since have been spent substantiating it: a parallel-reader benchmark puts 500M rows into Arrow in 2.3 seconds against ClickHouse and TimescaleDB. Around the releases, the feed is mostly engineering deep-dives, capital-markets case studies, and comparison guides.
Convex vs QuestDB: editorial side-by-side
Convex
2.5DEVOPS
Convex raised $57M on the argument that agents need a backend built for them.
◆ Current state
The feed is thin on releases and heavy on company milestones. A $57M Series B led by Insight Partners is the newest item, pitched around developers and their agents writing software together and needing a backend that keeps up. The substantive product news remains April's Convex for Enterprise, which added the compliance and scale posture the platform previously lacked; since then the feed carries a conference announcement and open-source recaps rather than shipped capability.
◆ Where it's heading
Convex is funding and positioning ahead of shipping. The enterprise release established the upmarket motion and the funding narrative attaches it to agent-written code, but nothing in the visible window shows the agent-facing product surface that framing implies. Whether that framing is real or aspirational is not something this feed answers yet.
◆ Prediction
With the round announced around agent workloads, the next substantive release is most likely on that surface, though the entries here give no detail on what form it takes.
QuestDB
6.3DEVOPS
QuestDB 10.0 collapses ingest and egress into one binary protocol, then aims at agent-run notebooks.
◆ Current state
QuestDB just shipped 10.0, its first major version bump in the visible window, built around QWP — a binary columnar wire protocol that handles writes going in and streams Arrow back out through a single client. The release also carries live views in beta, notebooks driven by coding agents, and the storage groundwork that QuestDB Enterprise 4.0 builds cold storage on. The days since have been spent substantiating it: a parallel-reader benchmark puts 500M rows into Arrow in 2.3 seconds against ClickHouse and TimescaleDB. Around the releases, the feed is mostly engineering deep-dives, capital-markets case studies, and comparison guides.
◆ Where it's heading
The protocol work is the thread that matters. QuestDB has been positioning against InfluxDB Line Protocol on ingestion throughput for a while — 33M rows/s on one machine at a million series, roughly 3.6x ILP over a network — and 10.0 turns that from a benchmark argument into the default path in and out. The follow-up post shifts the argument to the read side, which is the half QWP actually changes: folding Arrow egress into the same protocol points the database at the Python analytics stack directly rather than through a SQL driver, something the Polars and ConnectorX content has been rehearsing for months. Live views and agent notebooks are earlier-stage, and the Enterprise line continues on its own track.
◆ Prediction
Expect QuestDB Enterprise 4.0 next, built on 10.0's storage work and leading with cold storage, plus client libraries catching up to QWP one language at a time. Live views and the agent notebooks look likeliest to leave beta on a later minor rather than in the next release.
Alternatives to Convex and QuestDB
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 Convex or QuestDB.
SurveyJS
SurveyJS keeps a notes-free v1 line alive while v3 grinds through theming in beta.
Auth0
Auth0 is making AI agents first-class identities, not borrowed user accounts
immudb
immudb made itself speak Postgres — while its announced v2 rearchitecture sits unfinished.
Sonic
Sonic is shipping tokenizer control and a dependency diet, two tags at a time.
Postgres Operator
Zalando's Postgres Operator finally shipped v2 — and had to reissue it within a day.
See all Convex alternatives → · See all QuestDB alternatives →
Recent activity from Convex and QuestDB
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agoQuestDBStreaming 500 million rows into Apache Arrow in 2.3 seconds
- 2d agoQuestDBQuestDB 10.0: QWP, one binary streaming protocol for writes and Arrow reads ⚡
- 3d agoQuestDBIntroducing QuestDB's new binary ingestion protocol: QWP
- 3d agoConvexConvex raises a $57M Series B
- 19d agoQuestDBTransaction Cost Analysis with QuestDB and Polars: VWAP, Slippage and Markout
- 22d agoQuestDBHDFC Bank uses QuestDB for mule account detection across all major 25+ banking channels
- 24d agoQuestDBThe Most Expensive Instruction Might Be… cmov
- 3mo agoConvexWe're organizing a conference
- 4mo agoConvexConvex's 2025 open-source contributions, recapped
- 4mo agoConvexConvex for Enterprise (and updates to everything else) ⚡
- 6mo agoConvexJust landed in Europe
- 6mo agoConvexConvex Open Source Update
Frequently asked questions
What is the difference between Convex and QuestDB?
They serve adjacent needs but don't currently overlap on shipped themes. QuestDB is currently shipping more aggressively (velocity 6.3 vs 2.5), with 1 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 Convex better than QuestDB?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. QuestDB is currently shipping more aggressively (velocity 6.3 vs 2.5), with 1 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 Convex?
Top Convex alternatives in DevOps are ranked by recent ship velocity. Browse the "Convex alternatives" section above for the current picks, or visit /alternatives/convex for the full list with editorial commentary on each.
What are the best alternatives to QuestDB?
Top QuestDB alternatives in DevOps are ranked by recent ship velocity. Browse the "QuestDB alternatives" section above for the current picks, or visit /alternatives/questdb for the full list with editorial commentary on each.