SaaS - Our own product

Be1st.ai

Automated website audit across 4 areas: performance, SEO, security and AI visibility. Our own SaaS platform that we use daily when working with clients.

Delivery timeOngoing development

The challenge

The brief

We needed a tool that could reveal a website's weaknesses in under 30 seconds and show how AI search engines (ChatGPT, Perplexity, Gemini) see it. No off-the-shelf solution existed on the market.

The solution

Our approach

We built our own SaaS platform with a Next.js frontend and a Python FastAPI backend. Four audit tools with 51+ automated checks run on Vercel Edge. Payments via Stripe, invoicing via the Kros API, multi-model LLM via OpenRouter (GPT-4, Gemini, Perplexity Sonar).

Results

What we achieved

4 audit tools: Web Fingerprint, SEO + Security + Performance, AI Readiness, AI Visibility
51+ automated checks in under 30 seconds
AI Visibility score: how ChatGPT, Perplexity, Gemini and others see you
Serverless architecture: zero cost at idle, automatic scaling
GDPR-compliant tracking: Consent Mode v2, server-side Meta CAPI, PostHog (EU)

Technologies

Technologies used

Next.js 16React 19TypeScriptPythonFastAPI

SupabasePostgreSQL 17

Vercel Edge

Tailwind CSSRadix UI

Integrations

3rd party API integrations

Payments

StripeSubscriptions, invoicing, promo codes, customer portal (EUR + USD)

Invoicing

Kros APIAutomated invoicing for SK/EU clients including reverse-charge VAT

VIES (EU Commission)VAT ID verification for reverse charge - European Commission API

AI / LLM

OpenRouterMulti-model orchestration: GPT-4 mini, Gemini 2.5, Perplexity Sonar, BAAI BGE-M3 embeddings

Data

Google Ads APIKeyword search volumes (30 markets) for the SEO audit section

Brave Search APIBrand metadata enrichment: favicon, canonical URL, description

Analytics

Google Tag ManagerCentral tag container (GTM-TQFNJRWN), Consent Mode v2 default denied

Google Analytics 4Web analytics + server-side Measurement Protocol for purchase/refund events from Stripe

Meta Conversions APIServer-side conversion tracking with SHA-256 PII hashing, Limited Data Use (GDPR)

PostHogProduct analytics, session recording, error tracking - EU hosting, consent-based

Infrastructure

Supabase AuthJWT authentication, user and permission management

Supabase StorageStorage of WebP screenshots of audited websites (public bucket)

Vercel AnalyticsCore Web Vitals monitoring, performance telemetry

ECB / Frankfurter APIDaily USD/EUR exchange rates for invoicing, 24h cache

Security

Cloudflare TurnstileCAPTCHA protection of the contact form without cookies

Communication

Nodemailer (SMTP)Transactional emails via two identities: noreply@ and support@

Telegram Bot APIAdmin notifications: audit status, worker health, OpenRouter credits

See the result live

be1st.ai

Want a similar project?

Let's talk. We'll get back to you within 24 hours with a concrete proposal.