The Daily Index — Friday, September 25, 2026

GENERAL

TLDR Founders

DEVELOPERS DON'T BUY LIKE B2B BUYERS: EVERY CLAIM GETS CHECKED, EVERY PITCH IGNORED. Litebox [4] is the GTM agency for devtools companies that would rather keep building. Brand, website, and growth strategies for the most skeptical prospects, trusted by MotherDuck, Resolve AI and CopilotKit. Book a call

Summary unavailable

litebox.ai

TLDR Founders

YC STARTUPS ARE SKIPPING THE API AND SHIPPING AN MCP SERVER

36.1% of YC companies with an MCP server have no public API. 36.2% in the 2025 and 2026 batches served an llms.txt. The public API share has barely moved across batches. 81 of the 5,635 reachable YC domains are listed in the official MCP directory.

installmap.com · 3 min

TLDR Founders

THERE ARE NO MORE MOATS. YOU NEVER HAD ONE

Companies are buying more software than ever, but there's no loyalty anymore. They leave the moment something better ships. Migrations are now free, and contracts are monthly. Companies need to have the best product for the week, and then do it again next week. It's no longer about protecting a moat, but going out on the attack.

auren.substack.com · 12 min

TLDR Founders

THE SAASTR AI GUIDE TO BUILDING A TOP-TIER INBOUND AI AGENT: 17,000 CONVERSATIONS, ~600 MEETINGS BOOKED, AND 60% MORE NEW BUSINESS

SaaStr's inbound AI agent conducted 17,000 conversations and booked 600 meetings, boosting new business by 60%. Key improvements included replacing long forms with real-time qualification and direct meeting booking on high-intent pages. The self-serve agent enhanced this by creating personalized, trackable documents and employing heat mapping for deeper insights, supported by a lightweight, custom booking system on their site.

saastr.com · 10 min

TLDR Founders

→ kiro.dev/startups

Summary unavailable

links.tldrnewsletter.com

TLDR Founders

Terms and Conditions apply

Summary unavailable

links.tldrnewsletter.com

TLDR Founders

INTRODUCING FAST SEARCH IN THE PERPLEXITY SEARCH API

Fast Search runs on a Rust-based retrieval and ranking service called Photon that Perplexity built with a small team of engineers and hundreds of agents. It returns 95% of search results in 230 milliseconds or less. Fast Search has a median latency of 160 milliseconds, and it spends less on compute on ranking than Perplexity's default preset. Photon now handles all of the retrieval and ranking across Perplexity, replacing the open-source engine the company was using before.

threadreaderapp.com · 3 min

TLDR Founders

INTRODUCING AMAZON CLOUDWATCH OMNI: COLLABORATIVE AI-POWERED OBSERVABILITY FOR YOUR APPLICATIONS

Amazon CloudWatch Omni is an AI-powered observability experience for applications and agents. Working in Omni does not require access to the AWS Management Console. The telemetry sent to CloudWatch automatically appears in Omni with no reconfiguration required. Any other workload instrumented with OpenTelemetry sends its telemetry to an OpenTelemetry Protocol endpoint.

aws.amazon.com · 9 min

TLDR Founders

INTRODUCING THE IMAGE & VIDEO API

ElevenLabs' Image & Video API allows users to generate images and videos with the same ElevenLabs API used for speech. It supports 18 models, including Veo 3.1, Seedance 2.5, GPT Image 2.5, and Nano Banana Pro. The API is available today on Pro plans and above. Generations cost the same credits as in the ElevenLabs app, and failed generations aren't charged.

threadreaderapp.com · 2 min

TLDR Founders

WHY VENTURE DUE DILIGENCE GOT WORSE FOR DEEP TECH

Venture due diligence for deep tech has worsened, driven by deployment pressure, herding behavior, reliance on lead investors' reputations, and the removal of independent expert review layers. Deals in frontier tech sectors like AI and quantum often close rapidly without thorough technical vetting, exposing investors to unverified risks. Limited partners are advised to mandate independent technical feasibility reviews before deep-tech investments to enhance diligence and protect their capital.

postquantum.com · 24 min

TLDR Founders

WHAT IT TAKES TO BUILD GREAT PRODUCTS NOW

Getting there fast doesn't mean you've built something great. Teams need to decide whether a direction is the best, whether the product fits the team, and whether the product is worth building. The teams answering those questions well are strong in speed, direction, and differentiation. They'll keep moving through the final stretch, weigh many directions before betting on one, and shape the result into something only they would make.

figma.com · 13 min

TLDR Founders

THIS FOUNDER SOLVED HIS AGENCY'S PROBLEM AND TURNED THE SOLUTION INTO A $3M ARR SAAS

Vacation Tracker's landing page sat online for 18 months before someone on the waitlist tracked down the founder to ask when it would launch.

indiehackers.com · 7 min

TLDR Founders

THE MOST IMPORTANT MARKET IN AI IS THE MIDDLE

Demand is a normal distribution with a fat middle, and tokens may shift to a commodity as intelligence per dollar explodes.

tomtunguz.com · 2 min