Open-source alternatives to Retool

5 alternatives, ranked by a published maintenance score computed from live GitHub signals (fetched 2026-09-04). We flag unmaintained projects on both sides — including Retool itself when the data says so.

About Retool: Proprietary SaaS; per-user pricing for internal tools that only get occasional use. It is closed-source, so the same public maintenance signals do not exist for it — we score only the alternatives below.

The alternatives

Appsmith

90 /100 actively maintained

Drag-and-drop internal tools on your databases and APIs.

40,809 stars · last commit 2026-09-04 · latest release v2.3 (2026-08-13) · 4,477 open issues/PRs · Apache-2.0 · fetched 2026-09-04

How this 90/100 was computed

Last commit	today	40/40
Latest release	22 days ago	25/25
Community size	GitHub stars	15/15
Open-issue trend	not enough history yet — needs snapshots 21+ days apart; neutral 10/20 awarded meanwhile	10/20
Total		90/100

ToolJet

90 /100 actively maintained

Low-code internal tool builder with many data connectors.

40,844 stars · last commit 2026-09-04 · latest release v3.21.67-beta (2026-09-04) · 1,194 open issues/PRs · AGPL-3.0 · fetched 2026-09-04

How this 90/100 was computed

Last commit	today	40/40
Latest release	today	25/25
Community size	GitHub stars	15/15
Open-issue trend	not enough history yet — needs snapshots 21+ days apart; neutral 10/20 awarded meanwhile	10/20
Total		90/100

Budibase

90 /100 actively maintained

Internal apps and workflows from data sources in minutes.

28,254 stars · last commit 2026-09-03 · latest release v3.44.1-cloud.3 (2026-09-03) · 281 open issues/PRs · custom license · fetched 2026-09-04

How this 90/100 was computed

Last commit	yesterday	40/40
Latest release	yesterday	25/25
Community size	GitHub stars	15/15
Open-issue trend	not enough history yet — needs snapshots 21+ days apart; neutral 10/20 awarded meanwhile	10/20
Total		90/100

Lowcoder

71 /100 maintained

Community continuation of Openblocks; Retool-style app builder.

1,609 stars · last commit 2026-09-04 · latest release 2.7.6 (2026-01-03) · 276 open issues/PRs · AGPL-3.0 · fetched 2026-09-04

How this 71/100 was computed

Last commit	today	40/40
Latest release	8 months ago	12/25
Community size	GitHub stars	9/15
Open-issue trend	not enough history yet — needs snapshots 21+ days apart; neutral 10/20 awarded meanwhile	10/20
Total		71/100

ILLA Builder

46 /100 slowing down

Retool-style builder; development has slowed.

12,312 stars · last commit 2026-05-27 · latest release illa-builder@4.8.5 (2024-08-05) · 43 open issues/PRs · Apache-2.0 · fetched 2026-09-04

How this 46/100 was computed

Last commit	3 months ago	24/40
Latest release	2.1 years ago	0/25
Community size	GitHub stars	12/15
Open-issue trend	not enough history yet — needs snapshots 21+ days apart; neutral 10/20 awarded meanwhile	10/20
Total		46/100