I once torched $50,000 and an engineer’s soul for three months building a simple admin panel. True story. It was for one of my first companies, and we just needed a basic way to handle user data. "How hard can it be?" I thought. Turns out, pretty damn hard. The project became a black hole of shifting requirements and endless bugs. We ended up with a clunky piece of junk that everyone on the team hated. That’s when I learned a lesson that’s stuck with me: building custom internal tools from scratch is usually a terrible idea.
Today, the game is completely different. The whole “build vs. buy” thing is old news. Now, there’s a third way, a better way. Low-code platforms let you build surprisingly powerful, custom tools in hours, not months. You get the speed of an off-the-shelf tool with the flexibility of a custom build.
I'm constantly looking at tools for my portfolio companies, and three names keep coming up: Amplitude, Retool, and Appsmith. I’ve got skin in the game with all three, either as an investor or through companies I advise. They can be transformative, but they are definitely not interchangeable. This is my no-BS guide to figuring out which one you should actually use.
Amplitude: Your Product's Crystal Ball
Amplitude is my secret weapon. I tell every founder I invest in to install it on day one. You can't fly blind. If you don't understand your users, you're just guessing. Amplitude is the closest thing you'll get to a crystal ball for your product. It shows you what people are actually doing, where they bail, and what makes them stick around.
Let's be clear: Amplitude isn't for building apps. It's a pure product analytics tool. But it's the best there is. It makes tracking user actions, building funnels, and slicing and dicing your user base ridiculously easy. If you're a product-led company, this isn't just nice to have; it's your lifeblood.
I've seen it save companies. One of my portfolio startups was getting killed by churn. Great product, but users were vanishing after a week. We plugged in Amplitude, and in less than 24 hours, we saw it. A single, confusing step in their onboarding was the culprit. They shipped a fix, and boom—churn dropped by 30%. That’s not a vanity metric; that’s survival.
Now, it's not perfect. Amplitude's pricing can sting as you scale. And it's not magic. It won't give you a product strategy. If you don't know what questions to ask, all the data in the world won't help you. But if you have a clue, Amplitude will find you the answers.
Retool: The Internal Tool Rocket Ship
If Amplitude is your crystal ball, Retool is your rocket ship. I’ve seen engineers build things in an afternoon with Retool that would have taken my team weeks. The first time I saw it, my jaw hit the floor. A team at a hackathon I was judging built a full-blown customer support dashboard—pulling from five different APIs—in a couple of hours. They were deploying a real tool while other teams were still arguing about which JavaScript framework to use.
Retool is built for one thing and one thing only: building internal tools at insane speeds. It’s a drag-and-drop paradise of pre-built components. Tables, charts, forms, buttons—it’s all there. You can plug into any database or API, and if you need to get your hands dirty, you can write JavaScript anywhere. It’s the perfect 80/20 solution: 80% of the power of custom code with 20% of the effort.
I love hackathons. I’ve probably judged a hundred of them. You can always spot the Retool team. They’re the ones demoing a polished, working app while everyone else is presenting mockups and apologies. It’s an almost unfair advantage.
But let's be real, Retool isn't a charity. The pricing can creep up on you, especially with a big team. And it's not a replacement for custom code if you have a truly unique, mission-critical need. You're playing in their sandbox. But for 99% of the admin panels, dashboards, and CRUD apps that startups need to run, Retool is a no-brainer. In the startup world, speed is the only thing that matters, and Retool is pure, unadulterated speed.
Appsmith: The Open-Source Scrapper
I’m a huge believer in open-source. I’ve made a lot of money investing in open-source companies, but that’s not why I love it. I love it because it’s about freedom. It’s about taking back control from the big platforms. Appsmith is the embodiment of that spirit. It’s the scrappy, open-source underdog that gives you the power to build whatever you want, for free.
On the surface, Appsmith looks a lot like Retool. Drag-and-drop, pre-built widgets, connect to anything. But here’s the kicker: it’s open-source. You can host it yourself, you can fork the code, you can build your own custom widgets. It’s the ultimate playground for developers who want to own their stack, end-to-end.
I met a founder at a conference last year who was running his entire company on Appsmith. CRM, project management, analytics—everything. He was bootstrapped and couldn’t afford a bunch of expensive SaaS subscriptions. So he just built his own. That’s the kind of grit and resourcefulness that I love to see. That’s the power of open-source.
Look, Appsmith isn’t for the faint of heart. You’ll need some technical chops to get it up and running. It’s not as polished as Retool, and the community is smaller. But if you’re a developer who chafes at the limitations of closed-source platforms, or a founder who’s bootstrapping on a shoestring, Appsmith is a gift. It’s a bet on yourself, and sometimes, that’s the best bet you can make.
The Bottom Line
Alright, let's cut to the chase. No more stories. Here's how I see it.
| Amplitude | Retool | Appsmith | |
|---|---|---|---|
| What it is | Product Analytics | Internal Tool Builder | Open-Source Internal Tool Builder |
| Who it's for | Product Managers | Engineers in a hurry | Scrappy Developers |
| The Vibe | Expensive Suit | Tesla Model S | Souped-up Honda Civic |
| My Call | Use it for user insights | Use it for speed | Use it for control & cost |
My advice is simple:
- Got a product and need to know what your users are doing? Pay for Amplitude. Don't be cheap. It's worth it.
- Need to build an internal tool yesterday? Use Retool. Your engineers will thank you, and you'll ship faster.
- Are you a developer who wants to own your stack, or a founder watching every penny? Get your hands dirty with Appsmith. It's free, it's powerful, and it's yours.
The Revolution Isn't Coming, It's Here
I've been around the block a few times. I've seen hype cycles come and go. Low-code is not a hype cycle. It's a fundamental rewiring of how we build software. It's giving builders superpowers.
The era of wasting months and burning cash on simple internal tools is over. The new currency is speed. It's about empowering your team to build what they need, right now. Stop debating and start building. The tools are here. The only question is, what are you going to do with them?
Frequently Asked Questions
Can I switch later if I make the wrong choice?
In most cases, yes. The switching cost is usually lower than people fear. The bigger risk is analysis paralysis, spending months evaluating options instead of picking one and learning from real usage.
What factors matter most in this comparison?
For most founders, the three factors that matter most are: total cost of ownership, ease of implementation, and how well it integrates with your existing workflow. Features are important but often overweighted in decision-making.
Which option is best for startups?
It depends on your stage, budget, and specific needs. Early-stage startups should prioritize flexibility and low cost. Growth-stage companies can afford to optimize for performance and scalability. There's no universal answer.