I Built FundLap in a Weekend to Fix Mutual Fund Overlap — Now It's Helping Thousands Optimize Their Portfolios

The Problem No One Was Solving

Most mutual fund tools either hide critical insights, lock them behind paywalls, or overwhelm users with complexity.

As a data-obsessed investor, I found this deeply frustrating. I wanted something simple, powerful, and free — something that showed me the real picture of my portfolio, including the overlap that kills diversification and the fees that quietly drain returns.

FundLap started as a weekend experiment. Today, it's a free public platform built for serious investors, finance-curious developers, and anyone who wants to take control of their mutual fund strategy.

Try it at 👉 fundlap.com

From Frustration to First Build

A few months ago, I was trying to compare a few large-cap funds. Despite having different names and narratives, I realized they were holding the same top 10 stocks, in nearly identical proportions.

Even worse, I couldn’t find a free tool that highlighted this overlap clearly — especially not in a way that helped me decide what to do next. I didn’t just want analytics; I wanted actionable insights.

So I sat down on a Friday night and started building something lightweight. Two days later, FundLap was live.

It’s not just a product — it’s a belief: Investors deserve clarity.

Building as a Developer, Thinking Like an Investor

This wasn’t a YC-funded sprint or a 6-month roadmap. I’m a solo dev who writes TypeScript on weekdays and fiddles with data visualizations at night.

I didn’t plan to build a “startup” — I just wanted to solve a problem for myself. That made everything sharper. Fewer features, faster load, more insight per pixel.

Here’s what I optimized for:

  • 🔍 Immediate answers: You shouldn’t need an MBA to interpret your portfolio
  • ⚡ Speed: Zero login, zero friction — just paste fund names and compare
  • 🧰 APIs for builders: I love tools with APIs, so I made sure FundLap had one too

It’s easy to forget this: Every time we hit “invest,” we’re trusting a system we don’t fully see. As a dev, I had the tools to look deeper — so I did.

You Think You’re Diversified? This Link Might Prove You Wrong.

Most investors assume picking three different funds = instant diversification.

But here’s a live link that might surprise you:

👉 Check this portfolio on FundLap

It’s a combo of:

  • Parag Parikh Flexi Cap Fund
  • SBI Nifty 50 ETF
  • Nippon India Large Cap Fund

On the surface, they sound unrelated. Different fund houses. Different strategies.

But the overlap? It’s significant. 45%, 27%, even 93% duplication in holdings.

We’re not talking minor crossover — we’re talking redundancy that eats into your returns and inflates your fees.

That page gives you:

  • Real overlap data (down to the exact holdings)
  • Suggested replacements that maintain performance
  • Visuals showing how sectors stack up

No login. No cost. Just raw portfolio insight.

Sometimes, the truth about your portfolio is just one chart away.

For Indie Hackers: Why I Opened the API

I didn’t just want to build a tool — I wanted to make it buildable.

So I launched the FundLap API here:

👉 FundLap API on RapidAPI

I’ve always loved open APIs — they let people remix tools into things I’d never think of. This one’s no different.

You can use it to:

  • Build a fund comparison Telegram bot
  • Auto-update a Notion dashboard with overlap scores
  • Power your own finance tracker with metadata, returns, and diversification visuals

It’s clean, fast, and ready to plug into whatever you’re building.

Final Thoughts

FundLap wasn’t born in a pitch deck. It came from hitting walls as an investor — and having the skills to code a way around them.

If you’ve ever looked at your portfolio and thought, “Is this really working together?” — this tool’s for you.

And if you’re a builder? There’s room to remix it into something even better.

Start here 👉 fundlap.com

Or fork the vision with the API 👉 RapidAPI

Built on a weekend. Still shipping. 🚀