Build Signal Today

Daily startup ideas. Each one a full 15-section brief — who's in pain, what they're paying for, who's failing them, and exactly what you'd build to win.

[staff]

A note from the Tumblr team

A few weeks ago, a small but higher-than-normal number of accounts were mistakenly suspended. The suspensions were quickly reversed, but our response wasn't good enough, and we want to say more.

We're sorry it took us this long to address this. Trust and safety issues are difficult to discuss publicly, and we can’t share details about specific individuals or how our systems work without exposing Tumblr to bad actors. But caution led us to say too little, too late.

We’ve heard from members of the trans community on Tumblr that they were disproportionately impacted, and that deserves a direct response. According to 3rd party researchers, Tumblr’s userbase has the highest proportion of LGBTQIA+ folks on social media, so it makes sense that when something goes wrong, those communities might feel that disproportionate impact.

One thing we want to emphasize is that we do not moderate people's identities. We moderate behavior. We know that identity shows up across a Tumblr profile in many ways, from followed topics to the flags people put in their bios, and more. However, these signals play no role in how our moderation systems make decisions. We monitor those systems for evidence of bias and take corrective action when we find it.

We understand that the communications sent to affected users, and our broader silence to the community, didn't meet the standard people expect from us. That feedback is fair, and we apologize. We've updated the messaging sent to people impacted by these incidents. We are also overhauling our process with a goal of responding to mistaken suspension appeals within 24 hours, and have instituted an ongoing internal review of how suspensions and appeals are handled.

Going forward, we're committed to finding a better balance: being more transparent with our community about issues that matter, even when we can't share everything.

Tumblr belongs to everyone. We take that seriously, and we intend to earn back your trust. We are not afraid to have tough discussions with you or make updates based on your feedback, though on occasion, it might take some time.

To the people whose accounts were affected, and to the members of our trans community who felt targeted: we are truly sorry.

Tumblr Staff

[tumblr]

Reblogs in a chain now get their own notes

The reblog chain is one of the things that makes Tumblr unlike anywhere else. All the notes on reblogs are attributed to the original post, no matter which branch people actually liked or reblogged. We want to keep encouraging conversations, and give contributors the recognition they deserve. 

Soon, you'll be able to like, reblog, or reply to any part of a reblog chain, and that note will go to that reblog's author. Each reblog will have its own counts, instead of one aggregated number from every version of the post. And yes, you’ll be able to like multiple posts in one chain.

If a reblog doesn't add anything, the love flows up to the last person in the chain who did. Your post doesn't lose notes just because people spread it quietly.

Past notes will stay on the original post — we're only changing what happens from here on out. Retroactively re-attributing all of them would be... a lot.

This is just the beginning. More changes are coming as we keep building this out – stay tuned!

[changes]

It’s very clear that you all have strong feelings about Tumblr and about this change. We hear you. The passion people have for how Tumblr works is one of the things that makes this place special.

As this rolls out over the next few days and you explore it, we’ll keep reading your replies and reblogs, so please keep sharing your questions, concerns, and ideas.

Your creativity has always been the heart of Tumblr, whether you’re the original poster or adding something brilliant in the reblogs, and nothing about this change is meant to limit that.

If you’d like to talk directly beyond the comments, leave a reply and we’ll follow up with as many of you as we can. We want to work with you to make Tumblr better.

[buildsignaltoday]

Stop Building in the Dark: How to Build Signal Today for Your Next Profitable Idea

The startup graveyard is full of well-built products that nobody wanted. You’ve likely felt the sting—or know someone who has. You spend weeks or months building, only to launch to silence.

It’s not a lack of effort. It’s a lack of real signal.

For founders tired of guessing, there is a new way to build signal today. It’s called BuildSignal, and it’s transforming how serious entrepreneurs validate ideas before writing a single line of code.

The Pain Every Founder Knows Too Well

Here’s the truth they don’t tell you in the success stories: most products fail. Not because the code was buggy, but because nobody actually needed the solution.

One founder, Mohan, learned this the hard way. He built six products. Five of them died. The one that succeeded? It wasn't his best idea. It was his best-researched one.

Before building ProxiesAPI, Mohan didn't rely on "vibes" or shower thoughts. He dug into real data—analyzing Reddit threads, cross-referencing funding rounds, and mapping where competitors had stopped caring. The result? A profitable business from month three.

BuildSignal is that exact process, done for you, every single day.

What You Get When You Build Signal Today

BuildSignal isn't another "AI startup idea generator." It's a daily intelligence brief for serious founders. Every day, you receive a new, validated opportunity brief broken down into 15 detailed sections.

Each brief tells you:

Who is in pain (with direct quotes from Reddit and niche communities).

What they are currently paying for (and hating).

Who is failing them (with 1- and 2-star G2 reviews, not fluff).

Exactly what you would build to win.

Every data point is sourced. Every URL is verified. And every brief ends with a simple, honest verdict: BUILD or SKIP. No hedging. No fluff.

More Than Just Ideas: Your Founder-Sized Toolkit

BuildSignal doesn't just hand you a "what." It gives you the "how."

Once you find a promising brief, you can:

Shortlist & Compare: Save the opportunities that match your skills and risk appetite. Put two or three ideas side-by-side to compare TAM, competition density, and build complexity. Sometimes, the best way to pick an idea is to see it lose to a better one.

Generate a PRD Instantly: Found your idea? One click generates a founder-sized Product Requirements Document (PRD) scoped to an MVP. Hand it to a developer or start building yourself.

Create a Validation Questionnaire: Before you write a line of code, the platform auto-generates interview questions tailored to the specific pain points and willingness-to-pay (WTP) assumptions in the brief. Share it, collect responses, and talk to 5 people before you build for 5,000.

Who Should Build Signal Today?

This is not for wantrepreneurs collecting ideas or first-timers looking for motivation. This is for founders who have shipped before. You already know what good validation looks like. You want signal, not shower thoughts. You’d rather spend 10 minutes reading a data-packed brief than 40 hours doing the research yourself.

Lock in Your Lifetime Access

Here is the critical detail: BuildSignal just launched. You can currently get lifetime access for a one-time $99. This is a founding member offer.

The platform is moving to a monthly subscription soon. By acting now, you lock in permanent access to the full brief library (50 briefs live today, with a new one added every day), plus every future search, filter, comparison, PRD, and validation tool.

Don't build another product on a hunch. Build signal today. Get the data. Find the gap. And build something people actually want to pay for.

Claim Your Lifetime Access for $99 →

[buildsignaltoday]

Deep opportunity briefs with real validation data. 50 briefs live, a new one added every day. For founders who've built before.