What is App Stack Builder?

App Stack Builder is a free AI-powered tool that helps founders and developers choose the right tech stack for their projects based on budget, app type, team size, and skill level.

What is the best tech stack for SaaS in 2026?

The best tech stack for SaaS in 2026 typically includes Next.js 16 for frontend, Supabase for database and auth, Vercel for hosting, Stripe for payments, and PostHog for analytics. App Stack Builder can generate a personalized recommendation based on your specific budget and requirements.

Is App Stack Builder free to use?

Yes, App Stack Builder is completely free to use. You can generate unlimited tech stack recommendations without any cost.

What types of apps can I build with the recommended stacks?

App Stack Builder supports various app types including SaaS applications, web apps, mobile apps, e-commerce stores, internal tools, and AI/ML products.

How much does a SaaS tech stack cost per month?

A modern SaaS tech stack can cost anywhere from $0-50/month for bootstrapped startups using free tiers, $100-300/month for growth-stage startups, to $500+/month for enterprise-ready infrastructure. App Stack Builder helps you find the best tools within your specific budget.

What is the best tech stack for solo founders?

For solo founders, we recommend Next.js + Vercel (free), Supabase (free tier), Supabase Auth (free), Stripe (pay as you go), and Plausible or PostHog for analytics. This stack can run your entire SaaS for under $50/month.

Can I export my tech stack recommendations?

Yes, you can export your tech stack recommendations as a PDF document or copy them to your clipboard. You can also share a link to your stack with others.

Notifications & RealtimeFree tier

OneSignal: Pricing, Features & Alternatives

OneSignal is the mass-market end of this category: it is a messaging and engagement platform first, with push notifications as the wedge, and it serves marketers as much as engineers. Free covers a real amount of web push, and the Growth tier starts at $19 plus usage priced by channel — monthly active mobile users for push, subscribers for web. Where Novu and Knock orchestrate your product's notifications, OneSignal is where campaigns get sent.

OneSignal Pricing Plans (2026)

Plan	Price	Highlights
Free	$0	Unlimited web push sends · Basic segmentation · Mobile push included
GrowthPopular	$19 / month + usage	Priced per mobile MAU or web subscriber · Unlimited send volume · A/B testing and journeys
Professional	Custom (annual contract)	Volume discounts · Advanced analytics · Priority support

Pricing summary: Free · paid from $19/mo. Always confirm current pricing on the official site.

Key OneSignal Features

Priced per mobile MAU or web subscriber
Unlimited send volume
A/B testing and journeys

Pros

+Free tier covers real production web push
+Strong mobile push SDKs
+Campaign and journey tooling included
+Cheap entry price

Cons

−Usage pricing on top of the base fee
−More marketing tool than developer infrastructure
−Professional tier is annual and quote-only

Best OneSignal Alternatives

Compare all

Knock

Free · paid from $250/mo

Novu

Free · paid from $30/mo

Ably

Free · paid from $29/mo

Courier

Free · then usage-based

MagicBell

Free · paid from $249/mo

Pusher Channels

Free · paid from $49/mo

OneSignal Compared

OneSignal vs Knock OneSignal vs Novu OneSignal vs Ably OneSignal vs Courier OneSignal vs MagicBell OneSignal vs Pusher Channels

OneSignal FAQ

What is OneSignal used for?⌄

OneSignal is a notifications & realtime tool. Push, in-app, email and SMS messaging platform aimed at mobile and web audiences, with segmentation and campaign tooling.

Is OneSignal free?⌄

Yes — OneSignal has a free tier you can start with, and paid plans for more usage and features.

How much does OneSignal cost?⌄

OneSignal offers a free tier, with paid plans starting at $19/month. Some plans are usage-based (pay-as-you-go).

What are the best OneSignal alternatives?⌄

Popular OneSignal alternatives include Knock, Novu, Ably, Courier, MagicBell. Compare pricing and features on our OneSignal alternatives page.