AI & SaaS Glossary
Plain-English definitions for 86 essential terms in AI, machine learning, and SaaS.
A
A/B Testing
A/B testing is a method of comparing two versions of something, like a webpage or email, to see which one performs better with a real audience. It's a simple way to make data-driven decisions about design and content.
Agentic AI
Agentic AI refers to artificial intelligence systems that can autonomously plan and execute complex tasks by making independent decisions and taking actions to achieve specific goals.
AI Agent
An AI Agent is a software program that can perceive its environment, make decisions, and take actions autonomously to achieve a specific goal.
API
An API (Application Programming Interface) is a set of rules and tools that allows different software applications to communicate and share data with each other.
ARR
Annual Recurring Revenue (ARR) is a key metric for subscription-based businesses that shows the predictable yearly income generated from their active customer contracts.
Authentication
Authentication is the process of verifying that a user or system is who they claim to be, like logging into an app with a password or fingerprint.
Authorization
Authorization is the process of determining what an authenticated user or system is allowed to access and do within an application or service.
B
B2B
B2B, or Business-to-Business, describes companies that sell products or services primarily to other businesses, not to individual consumers.
B2C
B2C, or Business-to-Consumer, is a business model where a company sells its products or services directly to individual customers for personal use.
Bootstrapped
In business, 'bootstrapped' describes a company that has been started and grown using its own revenue and resources, without relying on external funding from investors or venture capital.
C
CAC
CAC, or Customer Acquisition Cost, is the total average expense a company incurs to acquire a new paying customer, including marketing and sales costs.
Caching
Caching is the process of storing frequently accessed data in a temporary, fast-access location so that future requests for that data can be served much more quickly.
CDN
A CDN (Content Delivery Network) is a system of servers spread across the globe that stores copies of website files, like images and videos, to deliver them to users faster and more reliably.
Chain of Thought
Chain of Thought is a prompting technique for AI models where the model is asked to show its step-by-step reasoning before giving a final answer, like 'showing its work' on a math problem.
Churn Rate
Churn rate is the percentage of customers or subscribers who stop using a service or product over a given period. It's a key metric for understanding customer retention and business health.
CI/CD
CI/CD is a software development practice that automates the process of building, testing, and deploying code changes, allowing teams to release updates more frequently and reliably.
Computer Vision
Computer Vision is a field of artificial intelligence that enables computers to interpret and understand visual information from the world, such as images and videos.
Context Window
A context window is the amount of text or data an AI model can consider at one time when generating a response.
Conversion Rate
Conversion Rate is the percentage of people who take a desired action, like making a purchase or signing up, out of the total number who had the opportunity.
D
DevOps
DevOps is a set of practices that combines software development (Dev) and IT operations (Ops) to shorten the time it takes to build, test, and release software.
Diffusion Model
A diffusion model is a type of AI that generates new images, audio, or video by learning to reverse a process of gradually adding noise to data, effectively 'imagining' the data from scratch.
DNS
DNS (Domain Name System) is the internet's phonebook, translating human-friendly website names like 'google.com' into the numerical IP addresses that computers use to find each other.
Docker
Docker is a platform that packages software and all its dependencies into standardized units called containers, which can run reliably on any computer.
F
Feature Flag
A feature flag is a software tool that lets developers turn a new feature on or off for users without changing the code or redeploying the application.
Few-shot
Few-shot is a technique where an AI model is given a small number of examples within its prompt to learn a new task or pattern before generating a response.
Fine-tuning
Fine-tuning is the process of taking a pre-trained AI model and further training it on a smaller, specialized dataset to make it better at a specific task.
Foundation Model
A foundation model is a large, general-purpose AI model trained on a massive amount of data that can be adapted for a wide variety of tasks.
Freemium
Freemium is a business model where a company offers a basic version of its software or service for free, while charging for access to more advanced features or capabilities.
Function Calling
Function calling is a feature that allows an AI model, like a large language model (LLM), to identify when a user's request requires an external tool or action and then generate the structured request needed to perform it.
G
Generative AI
Generative AI is a type of artificial intelligence that can create new content—like text, images, music, or code—by learning patterns from existing data.
Git
Git is a free and open-source version control system that helps developers track changes to their code over time, like a detailed history log for a project.
GraphQL
GraphQL is a query language for APIs that lets an application ask for exactly the data it needs, and nothing more, from a server.
I
IaaS
IaaS (Infrastructure as a Service) is a cloud computing model where a provider rents out fundamental computing resources like virtual machines, storage, and networking over the internet.
Indie Hacker
An indie hacker is an entrepreneur who builds and runs a small, profitable software business, often a SaaS product, mostly on their own or with a very small team. They focus on independence, creative freedom, and solving a specific problem for a niche audience.
Inference
Inference is the process where an AI model uses what it has learned to generate outputs, like text, images, or predictions, based on new inputs.
K
KPI
A Key Performance Indicator (KPI) is a measurable value that shows how effectively a company, team, or project is achieving its most important business objectives.
Kubernetes
Kubernetes is an open-source system for automating the deployment, scaling, and management of software applications that are packaged in containers.
L
Landing Page
A landing page is a standalone web page created specifically for a marketing or advertising campaign, designed to prompt a single, focused action from a visitor, like signing up or making a purchase.
LLM
An LLM, or Large Language Model, is a powerful AI program trained on massive amounts of text to understand and generate human-like language.
Load Balancing
Load balancing is the process of distributing incoming network traffic or computing tasks across multiple servers or resources to prevent any single one from becoming overwhelmed.
Low-code
Low-code is a software development approach that uses visual tools and pre-built components to create applications with minimal hand-coding.
LTV
LTV, or Lifetime Value, is a business metric that estimates the total revenue a company can expect to earn from a single customer over the entire duration of their relationship.
M
Marketplace
A marketplace is a digital platform where third-party developers can list, sell, or distribute their software applications, tools, or services to users of a larger core platform.
MCP
MCP (Model Context Protocol) is a standardized way for AI applications to connect to and use external data sources, tools, and services, acting like a universal plug for AI models.
Microservices
Microservices is a software architecture where a large application is built as a collection of small, independent services that communicate with each other, typically over a network.
Monorepo
A monorepo is a single, centralized code repository that stores the source code for multiple projects, applications, or services, along with their shared libraries and dependencies.
MRR
MRR stands for Monthly Recurring Revenue, which is the predictable total income a company expects to receive from its active subscriptions every month.
Multi-modal
Multi-modal AI refers to artificial intelligence systems that can process and understand information from multiple types of data, such as text, images, audio, and video, simultaneously.
MVP
An MVP, or Minimum Viable Product, is the simplest version of a new product that has just enough core features to be usable by early customers and gather their feedback for future development.
N
NLP
NLP, or Natural Language Processing, is a branch of artificial intelligence that enables computers to understand, interpret, and generate human language.
No-code
No-code is a software development approach that allows people to build digital applications and automate processes using visual, drag-and-drop interfaces instead of writing traditional computer code.
NPS
Net Promoter Score (NPS) is a simple metric, from -100 to 100, that measures customer loyalty by asking one question: 'How likely are you to recommend our company/product/service to a friend or colleague?'
O
OAuth
OAuth is a standard that lets you log into one website or app using your account from another service (like Google or Facebook) without giving away your password.
OKR
OKR stands for Objectives and Key Results, a goal-setting framework used by teams and individuals to define clear, measurable goals and track their outcomes.
Open Beta
An open beta is a public testing phase for a software product, where anyone can sign up to use it and provide feedback before its official launch.
Open Source
Open source refers to software whose original source code is made freely available for anyone to view, use, modify, and distribute.
P
PaaS
PaaS (Platform as a Service) is a cloud computing model where a provider delivers a ready-to-use platform for developing, running, and managing applications, without the user needing to build or maintain the underlying infrastructure.
PLG
PLG, or Product-Led Growth, is a business strategy where the product itself is the primary driver of customer acquisition, expansion, and retention. Users can try, adopt, and experience the core value of a product (often a software tool) for free or at a low cost before committing to a purchase.
PMF
Product-Market Fit (PMF) is the stage where a product successfully meets strong market demand, indicating that customers want and will pay for what you're offering.
Product Hunt
Product Hunt is a popular online platform where people can discover, share, and discuss new technology products, apps, and services.
Product Roadmap
A product roadmap is a high-level visual summary that maps out the vision, direction, and planned development of a product over time. It communicates the 'why' and 'what' behind upcoming features and improvements.
Prompt Engineering
Prompt engineering is the skill of carefully crafting the text instructions, or 'prompts,' you give to an AI model to get the best and most useful responses.
R
RAG
RAG (Retrieval-Augmented Generation) is an AI technique that combines a large language model's ability to generate text with a search system's ability to find relevant, up-to-date information from a specific database.
Rate Limiting
Rate limiting is a technique that controls how often a user or system can request a service, like an API, within a specific time period to prevent overuse and ensure stability.
Reinforcement Learning
Reinforcement Learning is a type of AI where a software agent learns to make decisions by taking actions in an environment and receiving rewards or penalties for its choices, much like training a pet with treats.
REST API
A REST API is a standardized way for different software applications to communicate over the internet, using simple web commands like 'GET' to retrieve data or 'POST' to send it.
Retention Rate
Retention rate is the percentage of users or customers who continue to use a product or service over a specific period of time, indicating how well a business keeps its audience engaged.
RLHF
RLHF, or Reinforcement Learning from Human Feedback, is a technique used to train AI models, like chatbots, to be more helpful, accurate, and safe by learning from human preferences and corrections.
S
SaaS
SaaS, or Software as a Service, is a way of using software applications over the internet, like a subscription, instead of installing them on your own computer.
SDK
An SDK, or Software Development Kit, is a collection of tools, libraries, and documentation that helps developers build applications for a specific platform, service, or piece of hardware.
Serverless
Serverless is a cloud computing model where the cloud provider automatically manages the underlying servers, allowing developers to build and run applications without worrying about infrastructure management.
SLA
A Service Level Agreement (SLA) is a formal contract between a service provider and a customer that defines the specific level of service the customer can expect, such as guaranteed uptime or response times.
SSL/TLS
SSL/TLS is a security technology that creates an encrypted connection between your web browser and a website, protecting any information you send or receive from being intercepted.
SSO
SSO (Single Sign-On) is a login method that lets you use one set of credentials, like a username and password, to access multiple related applications or services.
T
Token
In AI, a token is the basic unit of text that a model processes, which can be as short as a character or as long as a word.
Transformer
A transformer is a type of AI model architecture that excels at understanding and generating sequences of data, like sentences in a language, by focusing on the relationships between all parts of the input at once.
TypeScript
TypeScript is a programming language that builds on JavaScript by adding static type definitions, which help catch errors before code runs.
V
Vector Database
A vector database is a specialized type of database designed to store and quickly search for data based on its meaning or similarity, rather than by exact matches. It works by converting data like text, images, or sounds into numerical lists called vectors, which represent the data's characteristics.
Viral Loop
A viral loop is a self-repeating growth mechanism where each new user of a product or service naturally brings in more users, often through built-in sharing or referral features.
W
Webhook
A webhook is an automated message sent from one app to another when a specific event happens, like a text notification for a new order.
WebSocket
WebSocket is a communication technology that allows a web browser and a server to have a continuous, two-way conversation, enabling instant data updates without needing to constantly refresh the page.
White-label
White-label refers to a product or service created by one company that other companies can rebrand and sell as their own. It allows a business to offer a complete solution without having to build the underlying technology from scratch.