Presets

The library’s Presets shelf has 117 parts ready to go. A preset fills in a part’s kind, name, drawing, card, technology and starting limits; everything it fills in can be changed after. See start from a preset.

People and apps

Preset	Kind	What it is
Customers	Person	The people who use what you make.
Admins	Person	The people who run things behind the scenes.
Support team	Person	The people who help customers.
On call	Person	Whoever answers when something breaks.
Web app React	Client app	A website people use in their browser.
iPhone app iOS	Client app	An app on people's iPhones.
Android app Android	Client app	An app on people's Android phones.
Desktop app	Client app	An app people install on their computer.
Tills	Client app	The tills in a shop, taking payments.
Sensors	Client app	Devices that send readings on their own.
Partner integration	Client app run by someone else	Another company's system calling your API.

The way in

Preset	Kind	What it is
Cloudflare DNS Cloudflare	DNS	Turns your domain into the addresses traffic goes to.
Route 53	DNS	DNS that moves traffic away from a failed site.
Cloudflare CDN Cloudflare	CDN	Serves your pages and files from close to people.
CloudFront	CDN	A CDN that keeps most traffic off your servers.
Web firewall AWS WAF	Firewall	Blocks attacks and bad requests before they reach you.
DDoS protection Cloudflare	Firewall	Soaks up floods of traffic meant to take you down.
Bot protection	Firewall	Lets people in and turns bots away.
VPN Tailscale	Firewall	A private way in for your own team.
API gateway Kong	Gateway	Checks every call to your API and routes it.
GraphQL gateway GraphQL	Gateway	One query that gathers answers from several services.
Reverse proxy NGINX	Gateway	One front door in front of your servers.
Service mesh Istio	Gateway	Carries and secures the calls between your services.
Load balancer ALB	Load balancer	Shares traffic between healthy copies of a service.
HAProxy	Load balancer	Hands requests to each server in turn.
Token bucket limiter	Rate limiter	Lets bursts through, then settles to a steady rate.
Per-user limit Redis	Rate limiter	Caps how often one person can call in a minute.
API quota	Rate limiter	A daily allowance for each customer's calls.
Auth0 sign-in Auth0	Sign-in run by someone else	Sign-in run for you, with passwords and social logins.
Passkey sign-in	Sign-in	Signs people in with their device, and no password.
Keycloak	Sign-in	Your own sign-in, handing out tokens to the other parts.

Compute

Preset	Kind	What it is
REST API Node.js	Service	An API answering requests on a set of routes.
Web server Next.js	Service	Builds and serves your web pages.
Checkout service Go	Service	Takes a basket and turns it into an order.
Orders service	Service	Tracks each order from placed to shipped.
Kubernetes service Kubernetes	Service	A service in pods that scale out as traffic grows.
Container Docker	Service	A service packed in a container.
Background worker Sidekiq	Worker	Works through jobs from a queue.
Celery worker Celery	Worker	A pool of Python workers taking tasks.
Video encoder	Worker	Turns each upload into the sizes people stream.
Workflow engine Temporal	Worker	Runs long jobs step by step, and picks up after a failure.
Image resizer Lambda	Function	Makes every size of a picture when it's uploaded.
Webhook handler Cloudflare Workers	Function	Takes in events other companies send you.
Edge function Cloudflare Workers	Function	Small code that runs close to people.
Nightly export Cron	Scheduler	Starts an export every night.
Reminders	Scheduler	Sends reminders when they're due.
Data pipeline Airflow	Scheduler	Runs data jobs in order on a timetable.

AI

Preset	Kind	What it is
Claude	AI model run by someone else	A language model that answers, writes and reasons.
AI agent	AI model	A model that uses tools to get a task done.
Embeddings model	AI model	Turns text into numbers that capture its meaning.
Knowledge base	Search	Finds the passages a model needs to answer.
Vector database	Search	Finds the closest matches by meaning.
Recommendations	AI model	Picks what to show each person next.
Moderation	AI model	Checks posts and holds back the harmful ones.
Fraud check	AI model	Scores each payment and holds the risky ones.
Speech to text	AI model	Turns voice into text as people speak.

Messaging

Preset	Kind	What it is
SQS queue SQS	Queue	Holds jobs until a worker is free.
RabbitMQ	Queue	Shares messages out between its consumers.
Priority queue	Queue	Lets urgent work go first.
Dead-letter queue	Queue	Keeps messages that keep failing, to look at later.
Kafka topic Kafka	Topic	A log of events, split into partitions.
Event bus EventBridge	Topic	Carries events from the parts that publish to the parts that listen.
Pub/Sub topic Pub/Sub	Topic	Copies each event to every subscriber.
Outbox	Worker	Sends each saved change on as an event, so none is lost.

Data

Preset	Kind	What it is
PostgreSQL	Database	A relational database for your records.
Read replica PostgreSQL	Database	A copy of the database that takes the reads.
MySQL	Database	A relational database of tables and rows.
MongoDB	Database	A database of documents.
DynamoDB	Database	A key-value table that scales by itself.
Graph database Neo4j	Database	Keeps records and how they relate.
Time series database	Database	Keeps readings over time.
Ledger PostgreSQL	Database	Records every movement of money, always in balance.
Redis cache Redis	Cache	Keeps popular data in memory.
Session store Redis	Cache	Remembers who's signed in.
Memcached	Cache	A memory cache that drops the oldest keys first.
Elasticsearch	Search	Finds records by their words.
Algolia	Search run by someone else	Search as you type, run for you.
S3 bucket S3	Storage	Keeps files of any size.
Media storage Cloud Storage	Storage	Keeps the photos people upload.
Video library	Storage	Keeps videos ready to stream.
Backups Backblaze	Storage	A copy of everything, taken every night.
Snowflake	Data warehouse	Gathers data from everywhere for reports.
BigQuery	Data warehouse	A warehouse you ask questions of in SQL.
ClickHouse	Data warehouse	Fast analytics over lots of events.
ETL job	Worker	Copies data from your systems into the warehouse.

Outside services

Preset	Kind	What it is
Stripe payments Stripe	Service run by someone else	Takes card payments for you.
PayPal	Service run by someone else	Lets people pay with PayPal.
Shopify	Service run by someone else	A shop run for you, with its cart and checkout.
Email sending SendGrid	Service run by someone else	Sends your emails and tracks them.
Text messages Twilio	Service run by someone else	Sends text messages to people's phones.
Push notifications Firebase	Service run by someone else	Sends notifications to people's phones.
Delivery tracking	Service run by someone else	A courier's service for sending and tracking parcels.

Operations

Preset	Kind	What it is
Monitoring Datadog	Custom part run by someone else	Watches your systems' requests, errors and speed.
Error tracking Sentry	Custom part run by someone else	Collects the errors your apps hit.
Logs	Custom part	Gathers what every part writes down.
Dashboards Grafana	Custom part	Charts of how everything is doing.
Feature flags	Service	Turns features on for some people before everyone.
Build pipeline	Custom part	Builds, tests and ships each change.
Secrets vault	Custom part	Keeps passwords and keys out of the code.

Inside a service

Preset	Kind	What it is
HTTP routes Express	Endpoint	The routes a service answers, such as POST /payments.
GraphQL resolver GraphQL	Endpoint	Answers one field or mutation of a GraphQL API.
gRPC method gRPC	Endpoint	One method other services call over gRPC.
Webhook route	Endpoint	The route inside a service that takes in events another company sends.
Module	Module	A part of the code with one job, such as billing or accounts.
Domain logic	Module	The rules of the business, kept apart from how they're reached and stored.
Data access	Module	The code that reads and writes the service's records.
Source file TypeScript	Code file	One file of code, named by its path.
Entry file TypeScript	Code file	Where the service starts, wiring the other parts together.
Tests Vitest	Code file	The tests that check a part of the code still works.
Interface TypeScript	Interface	A promise in code that other code keeps, such as a TypeScript interface.
API spec OpenAPI	Interface	The written contract of an API, which clients and the service both follow.
Protobuf schema Protocol Buffers	Interface	The messages and methods of a gRPC service.
npm package npm	Library	A package the code is built on, from npm.
Payments SDK Stripe	Library	The library a service calls a payment provider with.
ORM Prisma	Library	Turns rows in a database into objects in code.
Table	Table	One table in a database, where a service keeps its records.
Table with columns	Table	A table drawn with its columns and their types.