19 ideas
Your own Mailchimp
Email marketing software: audience lists and tags, drag-and-drop email builder, campaigns and scheduling and more.
1–2 weeksYour own HubSpot
A CRM with marketing tools: contacts, companies and deals, pipeline board, email logging and more.
1–2 weeksYour own Salesforce
An enterprise CRM: leads, accounts, contacts and opportunities, custom fields, pipeline reports and more.
1–2 weeksYour own Klaviyo
Email and SMS marketing for online stores: sync customers and orders from Shopify, segments by behaviour, flows for abandoned carts and more.
1–2 weeksYour own Pipedrive
A sales pipeline CRM: deals on a drag-and-drop pipeline, activities and reminders, contacts and more.
WeekendYour own Semrush
An SEO and keyword research suite: keyword research, rank tracking, site audit crawler and more.
Big buildYour own Hootsuite
A social media scheduling dashboard: connect social accounts, compose and schedule posts, calendar view and more.
1–2 weeksYour own Zoho CRM
A CRM for small and mid-sized businesses: leads, contacts and deals, workflows, email templates and more.
1–2 weeksYour own Buffer
A simple social post scheduler: queue posts per channel, posting schedule, calendar and more.
WeekendYour own Apollo.io
A B2B lead database and outreach tool: search people by title and company, enrich contacts, email sequences and more.
1–2 weeksYour own HighLevel
An all-in-one CRM for marketing agencies: sub-accounts per client, funnels and forms, pipelines and more.
1–2 weeksYour own Clay
A spreadsheet for enriching leads: table of companies or people, enrichment columns that call APIs, aI columns that research each row and more.
1–2 weeksYour own Attio
A flexible, modern CRM: custom objects and attributes, auto-built records from email and calendar, lists and views and more.
1–2 weeksYour own Close
A CRM for inside sales teams: leads with contacts, calling and SMS, email sequences and more.
1–2 weeksYour own folk
A lightweight CRM for relationships: import contacts from email and LinkedIn, groups with custom fields, mail merge and more.
WeekendYour own Constant Contact
Email marketing for small businesses: contact lists, email templates, campaigns and more.
1–2 weeksYour own Later
A visual Instagram and TikTok planner: visual content calendar, media library, grid preview and more.
WeekendYour own Podium
Reviews and messaging for local businesses: ask for reviews by SMS, unified inbox for texts and webchat, payments by text and more.
1–2 weeksYour own Follow Up Boss
A CRM for estate agent teams: lead capture from portals, lead routing, texts, calls and emails and more.
1–2 weeks
More things to build
Upscalers, background removers, converters and generators. Image tools pull huge search volume and most of the work can run in the browser.
Compressors, croppers, GIF makers, subtitle generators and intro makers that people search for every month.
Voice generators, transcription, trimmers and noise removal. Pair a simple editor with a speech API and you have a product.
Hashtag, caption, title and bio generators, plus schedulers and thread tools. Small AI tools with steady search demand from creators.
Checkers, validators and generators for site owners: sitemaps, robots.txt, meta tags, SSL, speed and broken links.
Resume builders, AI writers and other everyday tools that people search for by name.
Profit, tax, churn, ROI and creator rate calculators. The easiest wins on this page: no backend, one formula, and searchers who are ready to act.
Your own take on ChatGPT, Perplexity, Midjourney, Otter and more, each with a prompt that wires up the API calls for you.
Feeds, follows, stories and communities: prompts for your own Instagram, Reddit, Threads or Letterboxd for a niche.
Chat, email and calls, from a Slack for your community to a Discord-style server app.
Swipe stacks, matches and chat for a niche dating app, with safety features built in from the start.
To-do lists, notes, wikis, kanban boards and project trackers. Most are a weekend to a week with Claude Code.
Form builders, help desks, e-signature, website builders and design tools. Plenty of people pay for each of these every month.
Budgeting, invoicing, expense tracking, trading journals and more. Where money moves, the prompts point you to a licensed provider.
Job boards, applicant tracking, shift scheduling and HR records for small teams.
Two-sided marketplaces and online stores, from a niche Etsy to a local Airbnb, with payments through Stripe Connect.
Scheduling, appointments, reservations and point of sale for local businesses: some of the easiest software to sell.
Workout logs, calorie counters, meditation and running plans. Many are a weekend build with a clear audience.
Flashcards, quizzes, courses and homework help, with Claude generating the lesson content.
Streaming, players, live video and media databases, with a video or audio API doing the heavy lifting.
Link-in-bio pages, newsletters, digital product stores, memberships and video editors for creators.
Maps, trail finders, flight trackers and booking tools built on open map data and travel APIs.
Scanners, file storage, password managers, blockers and other everyday tools.
Original browser games in the genres of the classics: puzzle, arcade, platformer, runner and party games. Your own name, art and levels, with familiar mechanics.
Give Claude more to work with while it builds: skills, MCP servers and subagents. Once it ships, use the overnight prompts to find users for it.