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PromptMax

Free plan Web

What PromptMax is

PromptMax processes CSV spreadsheet rows into completed output using a prompt and a selected AI model. Users can preview the first 10 rows for free, see a live cost estimate before submitting a job, save and reuse prompts, and use smart model routing for a recommendation based on the prompt and sample rows. The service lists 14 models from Google Gemini, Anthropic Claude, OpenAI GPT, and xAI Grok. A job can handle up to 50,000 rows, and the stated maximum file size is 10 MB. Direct Excel input is on the roadmap; jobs currently use CSV spreadsheets. The free signup includes £5 in credit without a card. Flexible top-ups start at £10, while enterprise setup is for teams spending £1,000+/month. The site says uploaded files are stored in Google Cloud Storage in the UK London region, isolated to each account, and not used to train AI. Selected providers may process data outside the UK, including in the United States, under stated safeguards. PromptMax describes its audience as professionals and small teams, including marketers, SEO specialists, e-commerce managers, content teams, and researchers.

Who it suits

It suits professionals and small teams that need to process spreadsheet rows with AI, including marketers, SEO specialists, e-commerce managers, content teams, and researchers. Users should be prepared to work with CSV files and account for the 10 MB file limit.

What it does well

Processes jobs of up to 50,000 rows.
Supports 14 models from four providers.
Free signup includes £5 credit without a card.
Shows a cost estimate before job submission.

What to know first

Jobs currently use CSV; Excel input is on the roadmap.
Maximum file size is 10 MB.
Selected AI providers may process data outside the UK.

Limits

The free signup provides £5 in credit. A job can contain up to 50,000 rows, and uploads are limited to 10 MB; jobs use CSV spreadsheets.

Plans

Plan	Billed and limits	Price
Test for free	£5 free credit on signup; no card needed · All supported models · prompt templates and examples · full job history · CSV output download	Free
Scale what works	Flexible top-ups from £10 · All supported models · larger files · priority queue · email support	£10, paid once
Enterprise	Custom setup for teams spending £1,000+/month · Dedicated infrastructure · custom data residency · SSO/SAML · SLA and uptime guarantee · dedicated Slack channel · quarterly business review	£1,000 a month

As promptmax.io lists them, read 9 Oct 2026. The maker's own page has the final word.

Getting started

Visit https://promptmax.io/.
Sign up to receive £5 in free credit; no card is needed.
Upload a CSV spreadsheet.
Write a prompt and select an AI model, or use smart model routing.
Preview the first 10 rows and review the live cost estimate.
Submit the job and download the CSV output.

Verdict

PromptMax is geared toward batch work in CSV files, with model choice, previews, and cost estimates before submission. Its file-size limit and possible international processing are worth considering before uploading data.

Questions

Does PromptMax have a free plan?

Yes. Signup includes £5 in free credit, and no card is needed.

How much do paid options cost?

Flexible top-ups start at £10. Enterprise is £1,000 a month for teams spending £1,000 or more monthly.

Which spreadsheet formats can I upload?

Jobs use CSV spreadsheets. Direct Excel input is listed as a roadmap item.

Which AI models does PromptMax support?

It supports 14 models from Google Gemini, Anthropic Claude, OpenAI GPT and xAI Grok.

How are uploaded files handled?

Files are stored in Google Cloud Storage in the UK London region, isolated to the user's account and not used to train AI. Selected providers may process data outside the UK, including in the United States, with stated safeguards.

Who operates PromptMax?

PromptMax is operated by Code4Ads Ltd, a company registered in England and Wales.

Facts from PromptMax's own pages

Audience: PromptMax describes itself as built for professionals and small teams, including marketers, SEO specialists, e-commerce managers, content teams, and researchers. · promptmax.io, 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, 9 Oct 2026
Founded: 2022 · promptmax.io, 28 Sept 2026
Headquarters: London, England, United Kingdom · promptmax.io, 28 Sept 2026
Input format: The FAQ says jobs use CSV spreadsheets; the site labels direct Excel input support as on the roadmap. · promptmax.io, 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, 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, 9 Oct 2026
Maker: PromptMax is operated by Code4Ads Ltd, a company registered in England and Wales. · promptmax.io, 9 Oct 2026
Models: The site says PromptMax supports 14 models from Google Gemini, Anthropic Claude, OpenAI GPT, and xAI Grok. · promptmax.io, 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, 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, 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, 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, 9 Oct 2026
Support: The site lists email support at [email protected] and includes email support among the scale plan benefits. · promptmax.io, 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, 9 Oct 2026

Where PromptMax stands on Freedom251

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