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PromptMax

promptmax.io

From £1,000/mo Free plan Web
Visit promptmax.io
Spec score 7.8 #14 of 29 in AI Product Description Generators

What it is

PromptMax turns rows in a CSV spreadsheet into completed output using a prompt and a selected AI model. It supports 14 models from Google Gemini, Anthropic Claude, OpenAI GPT, and xAI Grok, and a job can process up to 50,000 rows. The stated maximum file size is 10 MB. Users can preview the first 10 rows for free and see an estimated job cost before submitting. Saved prompts and smart model routing are available; routing recommends a model based on the prompt and sample rows. Direct Excel input is on the roadmap, while current jobs use CSV. 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. Selected AI providers may process data outside the UK, including in the United States, under stated safeguards. A free signup provides £5 credit without a card. Flexible top-ups start at £10, and enterprise setup is for teams spending £1,000+/month. PromptMax describes its audience as professionals and small teams, including marketers, SEO specialists, e-commerce managers, content teams, and researchers.

Spec sheet

What it does
PromptMax lets users upload a spreadsheet, write one prompt, select an AI model, and process every row into a completed spreadsheet.Read 9 Oct 2026 · promptmax.io
Audience
PromptMax describes itself as built for professionals and small teams, including marketers, SEO specialists, e-commerce managers, content teams, and researchers.Read 9 Oct 2026 · promptmax.io
Support
The site lists email support at [email protected] and includes email support among the scale plan benefits.Read 9 Oct 2026 · promptmax.io
Headquarters
London, England, United KingdomRead 28 Sep 2026 · promptmax.io
Founded
2022Read 28 Sep 2026 · promptmax.io
Maker
PromptMax is operated by Code4Ads Ltd, a company registered in England and Wales.Read 9 Oct 2026 · promptmax.io
Batch size
A single job can process up to 50,000 rows, and the FAQ lists a maximum file size of 10 MB.Read 9 Oct 2026 · promptmax.io
Input format
The FAQ says jobs use CSV spreadsheets; the site labels direct Excel input support as on the roadmap.Read 9 Oct 2026 · promptmax.io
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.Read 9 Oct 2026 · promptmax.io
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.Read 9 Oct 2026 · promptmax.io
Models
The site says PromptMax supports 14 models from Google Gemini, Anthropic Claude, OpenAI GPT, and xAI Grok.Read 9 Oct 2026 · promptmax.io
Preview and cost
Users can preview the first 10 rows for free, and the job form shows a live cost estimate before submission.Read 9 Oct 2026 · promptmax.io
Prompt tools
Users can save and reuse prompts, and smart model routing recommends a model based on the prompt and a sample of rows.Read 9 Oct 2026 · promptmax.io
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.Read 9 Oct 2026 · promptmax.io
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.Read 9 Oct 2026 · promptmax.io

Plans and prices

Test for free Free £5 free credit on signup; no card needed All supported models · prompt templates and examples · full job history · CSV output download Read 9 Oct 2026 · promptmax.io
Scale what works £10, paid once Flexible top-ups from £10 All supported models · larger files · priority queue · email support Read 9 Oct 2026 · promptmax.io
Enterprise £1,000 a month 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 Read 9 Oct 2026 · promptmax.io

Every PromptMax plan and price →

Strong points and limits

Strong points

  • Supports 14 models from four providers
  • Jobs can process up to 50,000 rows
  • Free preview of the first 10 rows
  • Shows a live cost estimate before submission
  • Free signup includes £5 credit without a card

Limits

  • Current jobs use CSV, not direct Excel input
  • Maximum file size is 10 MB
  • Selected providers may process data outside the UK

Who it suits

PromptMax suits professionals and small teams that need to apply an AI prompt to many spreadsheet rows. It may fit marketers, SEO specialists, e-commerce managers, content teams, and researchers who can work with CSV files.

Verdict

PromptMax is built for spreadsheet-based batch generation, with model choice, prompt reuse, and a cost estimate before submission. Its current CSV-only input and 10 MB file limit are important constraints to check first.

Where Specifiction places it

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