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PromptMax
London, England, United Kingdom
What it is
PromptMax turns CSV spreadsheet rows into completed output using one prompt and a selected AI model. Users can preview the first 10 rows for free and see a live cost estimate before submitting a job. The service lists 14 models from Google Gemini, Anthropic Claude, OpenAI GPT, and xAI Grok. A job can process up to 50,000 rows, with a stated maximum file size of 10 MB. Jobs currently use CSV files; direct Excel input is on the roadmap. Users can save and reuse prompts, while smart model routing recommends a model from the prompt and sample rows. A free signup includes £5 credit without a card. Flexible top-ups start at £10, and enterprise setup is for teams spending £1,000+/month. Uploaded files are stored in Google Cloud Storage in London, isolated to the account, and not used to train AI. Selected providers may process data outside the UK under stated safeguards.
For and against
For
- Processes up to 50,000 rows per job
- Fourteen models from listed providers
- Free preview of first 10 rows
- Live cost estimate before submission
- £5 signup credit without a card
Against
- CSV required; Excel support is only on roadmap
- Maximum file size is 10 MB
- Selected providers may process data outside the UK
The verdict
PromptMax focuses on prompt-driven CSV batch processing with model choice, previews, routing, and cost visibility. Its free credit allows initial use, while larger files, priority processing, and enterprise controls require paid options.
Who it suits
It suits professionals and small teams, including marketers, SEO specialists, e-commerce managers, content teams, and researchers. It is designed for bulk spreadsheet generation using supported AI models.
Plans and prices
Test for free
All supported models · prompt templates and examples · full job history · CSV output download
Read 9 Oct 2026 · promptmax.io
Scale what works
All supported models · larger files · priority queue · email support
Read 9 Oct 2026 · promptmax.io
Enterprise
Dedicated infrastructure · custom data residency · SSO/SAML · SLA and uptime guarantee
Read 9 Oct 2026 · promptmax.io
On the record
- Audience
- PromptMax describes itself as built for professionals and small teams, including marketers, SEO specialists, e-commerce managers, content teams, and researchers.promptmax.io · read 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.promptmax.io · read 9 Oct 2026
- Input format
- The FAQ says jobs use CSV spreadsheets; the site labels direct Excel input support as on the roadmap.promptmax.io · read 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.promptmax.io · read 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.promptmax.io · read 9 Oct 2026
- Maker
- PromptMax is operated by Code4Ads Ltd, a company registered in England and Wales.promptmax.io · read 9 Oct 2026
- Models
- The site says PromptMax supports 14 models from Google Gemini, Anthropic Claude, OpenAI GPT, and xAI Grok.promptmax.io · read 9 Oct 2026
- Preview and cost
- Users can preview the first 10 rows for free, and the job form shows a live cost estimate before submission.promptmax.io · read 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.promptmax.io · read 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.promptmax.io · read 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.promptmax.io · read 9 Oct 2026
- Support
- The site lists email support at [email protected] and includes email support among the scale plan benefits.promptmax.io · read 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.promptmax.io · read 9 Oct 2026
