Assemble your stack.
Or choose a platform that includes it.
A real SaaS is usually more than an app builder. Explore the infrastructure categories hiding behind the finished product.
Application Builders
BuildWithHQ · Bubble · Lovable · Replit · Bolt · WeWeb · FlutterFlow
Backend & Database
BuildWithHQ · Supabase · Firebase · Xano · Neon
Payments
Stripe · Paddle · Lemon Squeezy
Authentication
BuildWithHQ · Clerk · Auth0 · WorkOS
Email & Messaging
Resend · SendGrid · Postmark · Twilio
Analytics & Monitoring
PostHog · Amplitude · Sentry
AI Models
OpenAI · Anthropic · Google · open-source models
Vector Search
Native database vectors · Pinecone · Qdrant · Weaviate
Document Signing
DocuSeal and commercial e-signature providers.
The sticker price is not the SaaS cost.
A useful comparison includes builder fees, hosting, database, authentication, storage, vector search, messaging, observability, deployment, team seats, API usage and AI. This is why StartMySaaS uses a relative $–$$$$ indicator rather than treating the cheapest entry plan as the cheapest production stack.