Neuralink

Instacart

Neuralink

Neuralink doesn't have a traditional revenue model yet — it's still in clinical trials. The near-term plan is medical devices sold to hospitals and clinics for treating neurological conditions.

Brain-computer interfaces for paralysis, ALS, blindness, and other conditions would be reimbursed by insurance and healthcare systems, similar to cochlear implants or deep brain stimulators.

The long-term vision is consumer neurotechnology — healthy people choosing to get brain implants for enhanced cognition, communication, or AI interaction. This is years or decades away and faces massive regulatory and ethical hurdles.

But if it works, the total addressable market is literally every human brain on the planet.

The surgical robot is potentially a separate revenue stream. Even if the implant itself doesn't dominate, the precision robotics technology developed for neural surgery could be licensed to other medical device companies.

Neuralink has also built custom chip fabrication capabilities that could have applications beyond brain interfaces.

Instacart

Instacart operates as a marketplace connecting consumers with personal shoppers and grocery retailers. Revenue comes from multiple streams: delivery fees and service fees charged to consumers (typically $3.99+ per delivery), tips to shoppers (passed through, not revenue), retailer partnerships (grocers pay Instacart for access to the platform and fulfillment services), and advertising.

Advertising has become the crown jewel. Instacart Ads lets consumer packaged goods (CPG) brands like Coca-Cola, Procter & Gamble, and Nestlé pay for sponsored product placements within the Instacart shopping experience.

When someone searches for "chips," Doritos can pay to appear first. This is incredibly valuable because it's advertising at the exact moment of purchase intent.

Ad revenue was $871 million in 2023 and crossed $950 million in 2024.

The retailer partnership model is key. Unlike DoorDash or Uber Eats (which listed restaurants without permission early on), Instacart works with grocers as partners.

Over 1,500 retail banners including Costco, Kroger, Albertsons, and Publix have formal partnerships. Instacart provides the technology and shoppers.

Grocers provide inventory and stores.

Neuralink

Elon Musk had been talking about brain-computer interfaces publicly since at least 2016. His stated motivation was existential: if AI becomes superintelligent, humans need a way to merge with it or risk becoming irrelevant.

The solution, in his mind, was a direct neural link between the human brain and computers.

Neuralink was quietly incorporated in July 2016 in California. Musk recruited a team of eight co-founders — neuroscientists, engineers, and chip designers from institutions like UC Berkeley, MIT, and Lawrence Livermore National Laboratory.

The founding team included Ben Rapoport, a neurosurgeon who understood both the medical and engineering sides, and Dongjin Seo, who had done PhD research on neural dust (tiny wireless brain sensors).

The company operated in stealth for two years before a 2019 presentation where Musk revealed the vision: a coin-sized device implanted in the skull containing thousands of ultra-thin electrode threads inserted into the brain by a custom-built surgical robot. The threads are thinner than a human hair — roughly 5 microns wide — and each one contains multiple electrodes that read neural signals.

The robot was necessary because no human surgeon could place threads that thin without damaging brain tissue.

Instacart

Apoorva Mehta was a 26-year-old Amazon engineer in Seattle who quit his job in 2012 to start a company. The only problem: he had no idea what to build.

Over the next year, he started and abandoned roughly 20 different projects. A social network for lawyers.

A way to track restaurant wait times. Nothing stuck.

Then one day he was too lazy to go grocery shopping. He looked for a service that would shop for him and deliver everything to his door.

Nothing good existed. The existing options were grocery store delivery services that only worked during specific windows, had limited selection, and required ordering days in advance.

Mehta wanted to order groceries the way he ordered everything else online — immediately, from whatever store he wanted.

He built a prototype in 2012 and applied to Y Combinator. The demo was rough — he ordered a six-pack of beer through the app and had it delivered to a YC partner's house during the application process.

It worked. He got in.

Instacart launched in the San Francisco Bay Area in 2013 with a simple promise: order from your favorite local grocery store and have someone shop for you and deliver within an hour.

Neuralink

Neuralink's growth strategy is the classic Musk playbook: start with the premium use case that justifies the cost, then scale down. Phase 1 is medical — treat severe neurological conditions where no other option exists.

Quadriplegia, ALS, locked-in syndrome. Patients who literally cannot move or speak are willing to undergo experimental brain surgery.

The FDA granted Breakthrough Device designation in 2020, and the first human trial (PRIME study) began in 2024.

Phase 2 is expanding medical indications — blindness, depression, epilepsy, Parkinson's. Each new condition multiplies the patient population and the regulatory pathway, building clinical evidence along the way.

Phase 3 — the moonshot — is consumer enhancement. Musk has described this as "conceptual telepathy," where you think a message and it sends.

This phase requires proving extraordinary safety over years of medical use first. Nobody is going to electively implant a brain chip unless the medical version has been proven safe for a decade.

Instacart

Instacart grew by solving a problem one city at a time. They launched in San Francisco, proved the model, then expanded to other major metros.

Each new market required recruiting shoppers, signing up retailers, and building enough consumer density to make the economics work.

The COVID-19 pandemic was the inflection point. Grocery delivery went from luxury to necessity overnight.

In March 2020 Instacart announced it would add 300,000 shoppers, then raised that by another 250,000 weeks later. Order volume increased 500%.

Years of planned growth happened in weeks. The pandemic proved that grocery delivery wasn't a niche — it was the future of how a significant chunk of the population would shop.

The enterprise play is the long-term moat. By providing white-label technology to grocers, Instacart becomes embedded in their operations.

Even if a grocery chain wanted to build its own delivery service, they'd need years and hundreds of millions to replicate what Instacart provides. The more deeply integrated Instacart becomes in grocery operations, the harder it is to rip out.

Neuralink

The FDA and regulatory approval process is the primary bottleneck. Brain implants are Class III medical devices — the highest risk category.

Every design change, every new indication, requires extensive clinical data. The USDA also investigated Neuralink in 2022 for potential animal welfare violations in their primate testing program, which created PR headaches.

Long-term biocompatibility is an unsolved problem. The brain treats any foreign object as an invader and forms scar tissue around it, which can degrade signal quality over time.

Making an implant that works reliably for decades inside a hostile biological environment is one of the hardest engineering problems in medicine. Neuralink's thread retraction issue in their first human patient — where some threads pulled away from the brain — highlighted how much work remains.

Talent retention has been rocky. Max Hodak, the original president, left in 2021.

Several founding scientists departed. Working for Musk is notoriously demanding, and the timeline pressure on a medical device company clashes with the inherent need for cautious, methodical development.

Instacart

The post-COVID hangover was brutal. After pandemic demand normalized, growth slowed dramatically.

The company's valuation dropped from a peak of $39 billion in early 2021 to about $10 billion at IPO in September 2023. Investors who bought at the peak saw a 75% paper loss.

The narrative shifted from "essential infrastructure" to "nice-to-have luxury."

Unit economics are perpetually tight. Paying a person to walk through a grocery store, pick items, bag them, and drive them to someone's house is expensive.

Unlike meal delivery (one restaurant, one bag), grocery delivery involves dozens of items per order, refrigeration requirements, and substitution decisions. Every order that requires a shopper to call the customer about an out-of-stock item eats into efficiency.

Amazon is the existential threat. Amazon Fresh, Whole Foods delivery, and Amazon's own logistics network represent a competitor with nearly unlimited resources and a Prime membership base of 200+ million.

Amazon has been willing to lose billions on grocery delivery to build market share. Instacart's advantage is retailer partnerships — Kroger and Publix use Instacart specifically because they don't want to help Amazon dominate grocery.

Neuralink

The N1 Implant — a coin-sized device (23mm diameter, 8mm thick) implanted flush with the skull containing a custom chip that wirelessly transmits neural data to external devices via Bluetooth. The R1 Robot — a precision surgical system that inserts 64 flexible threads carrying 1,024 electrodes into the brain with micron-level accuracy, avoiding blood vessels using computer vision.

The N1 User App — software that translates neural signals into computer commands, allowing users to control cursors, keyboards, and eventually robotic limbs through thought alone. BCI Software Platform — the signal processing and machine learning stack that decodes raw brain signals into intended actions.

Instacart

Instacart Marketplace — the core platform where consumers order groceries from 80,000+ stores for delivery or pickup, with personal shoppers fulfilling orders. Instacart+ — subscription service ($9.99/month) offering free delivery on orders over $35, reduced service fees, and credit back on pickup orders.

Instacart Ads — a retail media platform letting CPG brands run sponsored product listings, display ads, and coupons within the shopping experience. Instacart Platform (Enterprise) — white-label e-commerce technology that lets grocers build their own online ordering and fulfillment powered by Instacart's infrastructure.

Caper Cart — AI-powered smart shopping carts (from the 2021 Caper AI acquisition) with built-in screens, barcode scanners, and payment that let shoppers skip the checkout line.

Neuralink

Elon Musk has been the primary funder, investing hundreds of millions of his personal wealth. The company raised $205 million in a Series C in 2021, then $280 million in a Series D in 2023 led by Founders Fund (Peter Thiel's firm).

A 2024 round reportedly valued the company at $8.9 billion. Google Ventures (GV) and DFJ Growth have also participated.

The investor base is narrow compared to most startups at this valuation.

Instacart

Sequoia Capital was an early and consistent backer. Andreessen Horowitz invested in growth rounds.

D1 Capital Partners led the 2021 round that valued Instacart at $39 billion. Existing investors including Valiant Capital, T.

Rowe Price, Fidelity, and Tiger Global participated across rounds. Y Combinator was the starting point (Summer 2012 batch).

The September 2023 IPO on NASDAQ priced at $30 per share, valuing the company at approximately $10 billion.