PromptMax
PromptMax turns rows in a CSV spreadsheet into completed output using one prompt and a selected AI model.
What PromptMax is
PromptMax turns rows in a CSV spreadsheet into completed output using one prompt and a selected AI model. Users can upload a file, preview the first 10 rows for free, and see a live cost estimate before submitting a job. The service supports 14 models from Google Gemini, Anthropic Claude, OpenAI GPT, and xAI Grok. A single job can process up to 50,000 rows, with a maximum file size of 10 MB. Direct Excel input is listed as being on the roadmap, while jobs currently use CSV spreadsheets. Users can save and reuse prompts, and smart model routing recommends a model based on the prompt and a sample of rows. Uploaded files are stored in the UK London region, isolated to the user's account, and are not used to train AI, according to the site. Selected AI providers may process data outside the UK, including in the United States, under stated safeguards. Enterprise setup is for teams spending £1,000+/month.
Good
- Supports 14 models across four providers.
- Jobs can process up to 50,000 rows.
- Free signup includes £5 credit without a card.
- Shows a live cost estimate before submission.
Watch out
- Jobs use CSV; direct Excel input is on the roadmap.
- File size is capped at 10 MB.
- Selected AI providers may process data outside the UK.
- Enterprise setup is for teams spending £1,000+/month.
Who it suits
PromptMax suits professionals and small teams such as marketers, SEO specialists, e-commerce managers, content teams, and researchers who want to process CSV rows with AI prompts.
Verdict
PromptMax is designed for batch processing CSV data through selected AI models. Its free credit provides a way to try jobs, while file size, format, and potential international processing are worth noting.
Plans and prices
From PromptMax's own pricing page, checked 9 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Test for free | Free | All supported models · prompt templates and examples · full job history · CSV output download · £5 free credit on signup; no card needed |
| Scale what works | £10, paid once | All supported models · larger files · priority queue · email support · Flexible top-ups from £10 |
| Enterprise | £1,000 a month | Dedicated infrastructure · custom data residency · SSO/SAML · SLA and uptime guarantee · dedicated Slack channel · quarterly business review · Custom setup for teams spending £1,000+/month |
The facts
Each one read from PromptMax's own pages, with the date it was checked.
What it does
- Audience
- PromptMax describes itself as built for professionals and small teams, including marketers, SEO specialists, e-commerce managers, content teams, and researchers.checked 9 Oct 2026
- Batch size
- A single job can process up to 50,000 rows, and the FAQ lists a maximum file size of 10 MB.checked 9 Oct 2026
- Input format
- The FAQ says jobs use CSV spreadsheets; the site labels direct Excel input support as on the roadmap.checked 9 Oct 2026
- Integrations and processors
- The privacy policy identifies Paddle for payments, Firebase for authentication and data services, Google Cloud for storage and Gemini processing, and Anthropic, OpenAI, and xAI for their selected models.checked 9 Oct 2026
- International processing
- The privacy policy says selected AI providers may process data outside the UK, including in the United States, with Standard Contractual Clauses or equivalent safeguards.checked 9 Oct 2026
- Models
- The site says PromptMax supports 14 models from Google Gemini, Anthropic Claude, OpenAI GPT, and xAI Grok.checked 9 Oct 2026
- Prompt tools
- Users can save and reuse prompts, and smart model routing recommends a model based on the prompt and a sample of rows.checked 9 Oct 2026
- Retention
- The privacy policy says account data and uploaded files are retained while the account is active and deleted within 30 days of an account deletion request, except where law requires retention.checked 9 Oct 2026
- Storage and model training
- The site says uploaded files are stored in Google Cloud Storage in the UK London region, isolated to the user's account, and not used to train AI.checked 9 Oct 2026
- Support
- The site lists email support at [email protected] and includes email support among the scale plan benefits.checked 9 Oct 2026
- What it does
- PromptMax lets users upload a spreadsheet, write one prompt, select an AI model, and process every row into a completed spreadsheet.checked 9 Oct 2026
The company
- Founded
- 2022checked 28 Sep 2026
- Headquarters
- London, England, United Kingdomchecked 28 Sep 2026
- Maker
- PromptMax is operated by Code4Ads Ltd, a company registered in England and Wales.checked 9 Oct 2026
Money
- Preview and cost
- Users can preview the first 10 rows for free, and the job form shows a live cost estimate before submission.checked 9 Oct 2026
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