The CEO (Chief Executive Officer) is the highest-ranking executive of a company, responsible for strategy, capital allocation, top-level hiring, and accountability to the board. The role also owns key external relationships with investors, the board, major customers, and partners. At most venture-backed startups it is held by a founder (the "founder-CEO") during early and growth stages, sometimes transitioned to a "hired CEO" during scale-up or later stages. It is the role that anchors the company's strategic direction and the position where most operational authority concentrates in venture-backed companies.
The core responsibilities of a CEO:
The vocabulary of the AI era of startups. This cluster covers the foundational concepts of modern AI (foundation models, LLMs, generative AI), the architecture and operations that power AI applications (Transformer, training data, fine-tuning, prompt engineering, RAG, context window), the economics that determine viability (inference cost, GPU cost, token economics), the strategic moats AI companies build (data flywheel, AI moat, wrapper vs thick wrapper), the safety considerations (alignment, safety), and current-era terms (multimodal, agents, vibe coding). 22 entries.
This cluster is the freshest in the lexicon. If you're building anything AI-adjacent in 2025, every entry here is operational vocabulary.
A PIPE (Private Investment in Public Equity) is the purchase of stock in a publicly-traded company at a discount to market price by institutional investors. Buyers include hedge funds, mutual funds, and growth equity firms, with public companies using PIPEs when they need capital quickly without the time and complexity of a traditional secondary offering. PIPE deals are relevant to startups primarily in the context of SPAC mergers (where PIPE financing typically accompanies the SPAC transaction to validate the combined company's pricing) and at post-IPO companies that need additional capital. Most pre-IPO startup founders don't deal with PIPE directly, but understanding it matters for SPAC contexts and post-IPO operations.
The mec...
Co-founder vs Founder vs CEO and Founder: Co-founder = a [founder] when there's more than one person at the origin. They're the same role; co-founder just describes the plurality. [CEO and Founder] is the title combo, a founder who also currently holds the CEO job. Read the founder entry for the origin-role definition; read this entry for the team-dynamics nuance (when does someone "earn" the title, what happens when there are too many, how the title gets misused as a recruiting tool).
A co-founder is a person who shares the work, equity, and financial risk of starting a company from its earliest stage, typically before product-market fit. The title is not granted by paperwork. It is earned by being on the cap table and on the ...
Paid social is the practice of running paid advertising on social media, where targeting uses user attributes and behavior rather than search intent. Platforms include the Meta family (Facebook and Instagram), TikTok, LinkedIn, X, Reddit, Pinterest, Snapchat, and YouTube, with targeting using attributes, interests, behavior, and lookalike audiences, and creative quality the dominant variable in performance. It is the demand-generation counterpart to paid search's demand-capture, and the channel where the platform algorithms have absorbed most of the optimization work that targeting and bidding once required.
The platform-by-use-case picture in 2025: Meta (Facebook and Instagram) is still the largest paid-social channel for most ...
A recruiting strategy is the deliberate approach a company takes to identifying, attracting, evaluating, and closing candidates for open roles. It covers sourcing channels (inbound applications vs outbound sourcing vs network-based vs recruiter-driven), interview design (structure, signal extraction, calibration), candidate experience (speed, communication, transparency), and compensation philosophy (where in market, how cash/equity balance). Most startups operate reactively (post a job, hope candidates apply) rather than strategically, leading to inconsistent hiring outcomes and significant founder and recruiter time wasted on the wrong candidates. It is the operational discipline that separates companies that hire well...
A capitalization table, or cap table, is the official record of a startup's ownership. It lists every shareholder and the number and type of securities they hold (common stock, preferred stock, options, warrants, convertible instruments like SAFEs and notes), maintained as the single source of truth for what each person would receive in a financing, sale, or liquidation event. It's the document that gets pulled, scrutinized, and recalculated at every meaningful moment in a company's life, every financing round, every 409A valuation, every secondary sale, every acquisition, every IPO.
The structure of a typical cap table:
By security type:
A startup website is the company's primary public-facing destination on the internet, used to convert prospects, attract talent, and signal credibility to investors. It is used simultaneously to convert prospects to customers, attract job candidates, signal credibility to investors and press, and rank in search for the queries the target buyer types. It is the one piece of marketing infrastructure every startup has, and one of the few that gets used by every audience the company has.
The must-have sections for an early-stage startup site are narrower than founders typically build. At minimum: a clear above-the-fold value proposition (what you do, for whom, why it matters), a primary call to action (signup, demo, or buy, not ...
An expense budget is the planned operating spending over a defined period, typically annual with monthly granularity. It's broken into categories like headcount and benefits (the largest), marketing and sales, infrastructure and tools, G&A (legal, accounting, rent, software), and sometimes R&D as a separate category. The budget is used for both forward planning (what will we spend?) and ongoing control (are we tracking to plan?), serving as an operational anchor that connects strategic decisions (what we're investing in) to financial outcomes (burn, runway, profitability). It is the operational counterpart to the revenue forecast.
The standard expense budget categories:
Headcount and benefits (typically 60-80% of to...
Reverse vesting is the mechanism where founder stock already issued at company formation becomes subject to a vesting schedule. Unvested shares are subject to company repurchase at original purchase price if the founder departs early, making the structure "reverse" because shares are owned upfront but earned over time through continued service, with 4-year vesting and a 1-year cliff being standard for founder shares in venture-backed startups. It's the structure that protects co-founders and investors from a founder taking equity and leaving.
The mechanics:
Initial issuance: founder receives shares at formation (typically restricted stock, not options).
Vesting schedule applied: 4-year monthly vesting with 1-year cliff is st...