# Retool vs v0: who uses which

On usedby, 128 companies use Retool and 6 use v0. 1 company uses both, including OpenAI. Counts include every proof level, job-post signals included; each company keeps its proof level on each side. Latest check 2026-10-15: 127 of 134 public lines checked.

## Side by side

|  | [Retool](https://www.usedby.ai/tools/retool.md) | [v0](https://www.usedby.ai/tools/v0.md) |
|---|---|---|
| Public customers | 128 | 6 |
| Confirmed | 38 | 0 |
| Observed | 89 | 6 |
| Signals (job posts) | 1 | 0 |
| Top industries of customers (every proof level) | Fintech & Payments (16), E-commerce & D2C (10), Data & Analytics (6) | Artificial Intelligence (2), Fashion & Apparel (2), Fintech & Payments (1) |
| Category | App builders & no-code | App builders & no-code |
| Free trial | Free trial or free plan available. ([retool.com](https://retool.com/pricing), checked 2026-10-03) | Free trial or free plan available. ([v0.app](https://v0.app/pricing), checked 2026-10-08) |
| Integrations | REST API, OpenAI, Google Sheets, PostgreSQL, Firebase, GraphQL, Salesforce, Slack, Stripe, Snowflake, MongoDB, Zendesk ([retool.com](https://retool.com/integrations), checked 2026-10-03) | — |

## Companies that use both

Every proof level counts; the proof level of each side is shown, strongest proofs first. The first public proof is not an adoption date.

| Company | Proof, Retool | Proof, v0 | First public proof, Retool |
|---|---|---|---|
| [OpenAI](https://www.usedby.ai/companies/openai.md) | Observed | Observed | On or before October 2024 |

## Published results

Reviewed stories only; usedby did not measure the figures.

- Retool: [Ramp](https://www.usedby.ai/case-studies/ramp-retool.md): **over 100**: “use Retool to build and manage over 100 internal solutions for every team” (captured by usedby 2026-10-08)
- Retool: [Greenly](https://www.usedby.ai/case-studies/greenly-retool.md): **3x**: “improved the company’s time-to-deployment KPI by 3x” (captured by usedby 2026-10-08)

---
Source: https://www.usedby.ai/compare/retool-vs-v0 · How we check: https://www.usedby.ai/methodology