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Case Study · Promptello

The prompt engineering tool your whole team can actually share.One prompt library. Three top models. Zero bad-prompt tax.

Promptello is a prompt management platform, AI prompt generator and multi-model workstation in one — capture intent by voice or text, let the adaptive interview engine sharpen the brief, and auto-route to Claude, Gemini or GPT. Every prompt is versioned, templated with variables, and shareable across your team or sellable in the built-in marketplace.

Try it free at promptello.app Book an enterprise demo

Open promptello.app — 10 free prompts run in-browser before any signup wall.

10 free prompts, no signup Auto-routed across GPT · Claude · Gemini SOC-friendly, RLS-backed
Promptello workstation — intent capture with multi-model routing
Who It's For

Built for anyone who ships with AI more than once a week

Promptello is a prompt engineering tool for teams and a prompt marketplace for creators — one workstation, eight kinds of user who already rely on it.

Enterprise & IT

CTOs, Heads of AI, RevOps leads rolling AI out across 100+ seats.

Pain · Shadow-ChatGPT, off-brand output, no audit trail, no cost control.
Win · One governed prompt library with SSO-ready RLS and a per-generation audit log.

Marketing agencies

Founders and senior strategists juggling 5–30 client brands.

Pain · Every new hire re-invents the wheel; brand voice drifts on every retainer.
Win · One brand profile per client, cloneable template packs, exportable IP handover.

Software teams

Engineering leads and senior devs codifying AI-assisted workflows.

Pain · Prompts live in Notion, Slack DMs and personal notes — nothing versioned.
Win · Git-style prompt versioning, {{variable}} templates and diffs across every refinement.

Content & social teams

Content leads shipping across LinkedIn, blog, email, YouTube every week.

Pain · Copy-paste tax between five model tabs; long-form and short-form need different brains.
Win · Auto routing across Claude, Gemini and GPT with channel-specific templates.

Solo creators & founders

Indie hackers, newsletter writers, prompt-crafters selling their expertise.

Pain · Winning prompts sit in a Notes app, unmonetised and unversioned.
Win · 10 free prompts, no signup, then a marketplace that turns your library into revenue.

Educators & consultants

Prompt engineering trainers, workshop leaders, university programmes.

Pain · Teaching prompt craft with ChatGPT means no versioning, no rubric, no receipts.
Win · Assignable brand profiles, shareable prompt packs and diffs students can grade against.

Sales & customer success

Revenue teams running outbound, renewals and escalations at scale.

Pain · New reps take months to sound like your top rep; replies drift off playbook.
Win · Templated outreach with prospect variables baked into your qualification framework.

Product & UX researchers

PMs and researchers running discovery, synthesis and copy validation with AI.

Pain · Prompt inconsistency makes AI-assisted research irreproducible.
Win · Versioned prompts, reusable interview schemas, model-neutral output for triangulation.
The Product

Three surfaces, one workstation

Promptello is structured around Forge, Studio and Market — try it, work in it, monetise from it. Every surface is live at promptello.app right now.

Public · No signup

Forge

The try-before-you-buy demo. Speak or type an intent, get a polished, model-tuned prompt in seconds.

  • 10 free runs tracked in localStorage — no auth wall until you're convinced
  • Voice-first input via Whisper (gpt-4o-mini-transcribe) with a server fallback
  • Multimodal: attach a reference image and the prompt inherits visual constraints
Open the Forge
Authenticated workspace

Studio

The full workstation: library, editor, adaptive interview, brands, projects, models, dialogue.

  • Library with full-text search, folders, tags, favourites and archives
  • Adaptive interview generates 3–5 questions per intent — text, chips, toggle, slider
  • Autosave every 700ms, ⌘K palette everywhere, immutable version history with diffs
Explore the Library
Creator economy

Market

Publish any prompt with one toggle, set a price, keep 85%. Stripe Connect handles payouts.

  • 15% platform fee — undercuts most prompt-specific marketplaces at 20–30%
  • Earnings dashboard: total sales, subscribers, per-prompt performance table
  • Weekly or on-demand Stripe payouts to your bank
See monetisation
How It Works

The six-step AI pipeline behind every prompt

From a rough idea to a versioned, model-tuned prompt in under two minutes — no blank-input dread.

01

Intent

Speak or type a rough goal. Whisper transcribes voice in-browser and hands the transcript to the pipeline.

02

Analyze

The router reads your intent against the model catalog and category schemas, then drafts 3–5 clarifying questions.

03

Interview

Adaptive Q&A — text, chips, toggle, slider. Every answer autosaves to the draft so you can leave and return.

04

Forge

Answers + brand voice + category skeleton + model best-practice are synthesised into a polished v1 prompt.

05

Improve

"Make it shorter", "add examples" — every revision is a new immutable version with diffs and rollback.

06

Output

Run the prompt against your chosen model, rate the output, and reuse the winning version as a template.

Under the hood

TanStack Start on Cloudflare Workers, Postgres with Row-Level Security, and the Lovable AI Gateway routing across Claude Sonnet, Gemini 2.5 and GPT-4o. Every AI call is logged in a usage ledger with tokens and estimated cost — no surprise bills.

Browse the model catalog
ROI Calculator

The real cost of bad prompting

Every re-prompt costs time and tokens. Move the sliders to see what your team is quietly losing this year.

50
12,000
6 hrs
1 hr40 hrs

Formula: hours × employees × 52 × £40 × 0.4. Based on average UK knowledge-worker cost of £40/hr and a conservative 40% efficiency gain from structured, versioned prompts.

Estimated annual savings
£249,600
Token cost reduction
£1,123
Fewer re-prompts, tighter context windows
Try promptello.app free
The Solution

A prompt workstation, not a chat box

Three abilities every AI-first team is quietly begging for.

Context-Aware Engineering

Prompts that know your brand, your audience and your constraints — automatically.

Deep dive
  • Reusable brand profiles inject tone + audience into every generation.
  • Per-category JSON schemas validated with Zod so briefs are never half-baked.
  • {{Variables}} detected in real time — every prompt becomes a template.

Template Library

Every winning prompt versioned, tagged and searchable — like Git for your intellectual property.

Deep dive
  • Immutable version history with diffs, favourites and archives.
  • Folders, tags, categories and a ⌘K palette across everything.
  • Row-Level Security in Postgres — private by default, shareable by choice.

One-Click Optimization

Auto-router picks the best model. Optimizer rewrites the prompt. You just hit run.

Deep dive
  • Auto mode routes across Claude Sonnet, Gemini 2.5 and GPT via a unified gateway.
  • ModelPill shows which brain answered — trust and cost visible per generation.
  • One-click 'Enhance' rewrites weak prompts into structured, high-signal briefs.
Use Cases

One workstation, every team

How different teams use Promptello to move faster without going off-brand.

One brand voice across 500+ employees — governed, not policed

Enterprises publish their brand profile once. Every prompt from marketing, sales, support and product inherits tone, audience and legal guardrails automatically. Row-Level Security keeps teams isolated, and an audit trail per generation makes procurement and compliance sign-off painless.

We stopped policing our team's ChatGPT tabs and started shipping a brand system they actually want to use.
500+
employees on one voice
0
off-brand generations
1
brand system, versioned
Real Plays

Eight ways teams actually run Promptello every week

Not hypothetical. These are the workflows early users returned to on day two.

Marketing

Weekly LinkedIn engine

Dictate five ideas on Monday, let the interview engine sharpen each, auto-route long-form drafts to Claude and hooks to GPT, schedule via a variable-driven template — a week of on-brand posts in under 30 minutes.

Engineering

Framework migration boilerplate

Save a migration template with {{sourceFile}}, {{targetFramework}} and {{testStrategy}} variables. Batch-run across 40 files with consistent structure and passing tests on the first try.

SEO

Programmatic content briefs

Feed a keyword list into a brief template with SERP-derived variables. Promptello returns 50 outline-ready briefs your writers or AI can execute — all tied back to one brand voice.

HR & People

Job description factory

Reusable role template with {{seniority}}, {{team}}, {{comp_band}} — HR ships new JDs in minutes, every one on-voice and compliant with your DEI language guardrails.

Support

Escalation reply playbook

Template captures customer name, tier, issue category and desired outcome; auto-routes to Claude for long refund walk-throughs, GPT for punchy holding replies — every message on tone.

Agency ops

New-client onboarding pack

Clone a brand profile, attach a 12-template starter pack, invite the account team — an entirely new client is production-ready inside an afternoon instead of a two-week ramp.

Education

Prompt engineering coursework

Give students a starter brand profile and a rubric of five prompts. Diffs show exactly how their refinements changed the output — grading prompt craft, not vibes.

Solo creator

Sell your winning prompt

Flag a prompt as premium, set a price, share the public link. Marketplace handles payments, gating and payouts at a 15% fee — versus 20–30% on prompt-specific marketplaces.

See it in action

Weak prompt vs Promptello-enhanced

Same idea, same model. The prompt is the product.

Weak prompt
Generic. Bland. Re-prompt city.
Prompt
write me a blog about ai for small business
AI output
AI is a hot topic in business today. Many companies are exploring AI. It can help with many things. Here are some ways AI helps small businesses: 1) automation 2) customer service 3) marketing. In conclusion, AI is the future.
Promptello-enhanced
Structured. On-brand. Ship-ready.
Prompt
Role: senior B2B content strategist for UK SMBs.
Goal: 1,400-word outline for 'AI for small business' targeting owners with 5–50 staff.
Brand voice: direct, no hype, examples > adjectives.
Structure: H1, 5 H2s, each with 3 H3 bullets + a specific tool + a UK cost figure.
Exclude: 'unlock', 'game-changer', 'in today's fast-paced world'.
AI output
H1: The 4-hour AI stack a 20-person UK business can actually run
H2 1. Where AI pays back inside 90 days
  - Inbox triage (Superhuman AI, £25/mo/seat)
  - Meeting notes (Fireflies, £15/mo/seat)
  - Draft proposals (Claude Team, £24/mo/seat)
H2 2. What to automate first…
The 7× Factor

Numbers that survive procurement

What Promptello does for teams that used to burn hours on re-prompts.

0.0×
Faster workflows
vs unstructured prompting
0%
Fewer re-prompts
First-run acceptance rate
0%
Token cost reduction
Tighter context, cleaner briefs
Pricing

Priced for creators, procurement and everyone in between

All prices in GBP. The Free tier is a real product, not a teaser.

Free

£0
forever

The public Forge. Prove it works before you sign anything.

  • 10 free prompt runs, no signup
  • All models available in Auto routing
  • Voice or text intent capture
  • Export the output to any AI chat
Start free at promptello.app

Pro

Most popular
£24
per month · £240/yr saves 17%

The full Studio for serious individual creators and freelancers.

  • Unlimited forges, improves and runs
  • Immutable version history + diffs
  • Brands, projects, folders, tags, {{variables}}
  • Voice-to-prompt + file uploads (PDF, docs)
  • Markdown / JSON export
  • Marketplace publishing at 15% platform fee
Create your account

Team

£39
per seat · roadmap Q3 2026

Shared brands, collaborative projects, team-wide prompt library.

  • Everything in Pro, per seat
  • Shared brand profiles across the team
  • Collaborative projects + comments
  • SSO-ready RLS with per-user audit trail
  • Admin dashboard for usage + cost
Talk to Streamline Digital

Marketplace creators keep 85% of every sale. Compare to Gumroad (10%) and prompt-specific marketplaces at 20–30% — Promptello sits in the middle with a full workstation attached.

Success Story

Real teams, real receipts

"Promptello turned my prompt library into an asset. I dictate an idea, the app interviews me, and a week later I'm selling the winning prompt to other creators — from the same workstation I drafted it in."
Beta creator
Promptello early access programme
8 wks
Idea → live product
3
Models auto-routed
15%
Marketplace platform fee
FAQ

Everything procurement and power users ask

Straight answers on the prompt engineering tool, prompt library, marketplace and multi-model routing.

What is Promptello and how is it different from ChatGPT?

Promptello is a prompt engineering tool and prompt management platform that sits on top of the leading AI models — Claude, Gemini and GPT — instead of replacing them. Where ChatGPT is a chat box, Promptello is a workstation: intent capture, adaptive interview, model auto-routing, versioned prompt library, reusable brand voice and a creator marketplace.

Is Promptello a good ChatGPT prompt library for teams?

Yes. Every prompt is versioned in Postgres with folders, tags, favourites and diffs. Row-Level Security isolates users and brands, so teams and agencies get a shared prompt library without leaking IP across clients.

Which AI models does Promptello support?

Claude Sonnet, Gemini 2.5 and GPT are routed through the Lovable AI Gateway. Pick a model manually or choose Auto and let the router evaluate the intent and send it to the best-fit model. A ModelPill on each response shows which model answered.

Can I turn my prompts into reusable templates?

Yes. The editor detects {{variables}} in real time, so any prompt can become a parameterised template. Brand profiles inject tone, audience and guardrails automatically — templates plus brands plus variables is where the 7× throughput comes from.

How does the AI prompt marketplace work?

Flag any prompt as premium, set a price and share the public link. Promptello takes a 15% platform fee — competitive against Gumroad's 10% and prompt-specific marketplaces charging 20–30%. Sales, subscribers and per-prompt performance appear in a dashboard.

Do I need to sign up to try it?

No. Ten prompts run before an auth wall ever appears, tracked in localStorage. Trust-first funnel that outperforms the industry norm.

Is my prompt data private?

Yes. Every user's prompts, versions, brands and projects sit behind Postgres Row-Level Security policies enforced at the database — not in application code. Only prompts explicitly flagged premium and published are visible to buyers.

Can Streamline Digital build something like this for our team?

Yes. The same pattern — capture, interview, multi-model routing, versioned library, marketplace layer — transfers to internal knowledge tools, agency deliverables and vertical AI products. Book a call and we'll scope it.

Stop paying the bad-prompt tax.

Ten free prompts. No signup. See what your team could ship if every AI request started from a structured, versioned brief.

Try it free at promptello.app Talk to us about your team

Direct link: promptello.app · Built by Streamline Digital · See all case studies

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