Software for Startups: The Complete Tech Stack

Startups that need a completely free CRM with unlimited users to manage contacts, deals, and email tracking from day one. HubSpot's free tier includes contact management, deal pipeline, meeting scheduling, and email tracking for up to 2,000 emails per month, which is enough for most early-stage teams to run a structured sales process. As the startup grows, the paid plans layer in sequences, workflow automation, and custom reporting without requiring a platform migration. The native integration with HubSpot's Marketing and Service Hubs also means startups can consolidate their entire go-to-market stack under one roof, avoiding the integration headaches that plague fragmented toolchains.

Engineering-focused startups that need a fast, keyboard-driven project management tool for sprint planning, issue tracking, and product roadmapping. Linear is built specifically for software teams that value velocity — it eliminates the overhead of traditional PM tools with a streamlined interface optimized for triage, estimation, and cycle time tracking. The project views (roadmap, board, backlog) give founders and engineering leads real-time visibility into what the team is building and when it will ship. Linear's cycle-based methodology naturally fits the agile sprint model most startups adopt, and its powerful API enables custom automations and integrations with GitHub, Slack, and CI/CD pipelines.

Remote-first startups that need organized, searchable team communication with deep integrations across the entire tech stack. Slack's channel-based architecture lets startups create dedicated spaces for engineering, product, marketing, sales, and customer support while keeping cross-functional collaboration fluid through shared channels and Slack Connect. The platform's app directory offers thousands of integrations — from Linear and GitHub to HubSpot and Stripe — that bring notifications, approvals, and status updates directly into the conversation stream. Canvas documents and Huddles provide lightweight documentation and real-time audio conversations that reduce the need for scheduled meetings.

Startups that need version control, CI/CD, code review, and project management in a single developer platform. GitHub is the de facto home for open-source and private repositories, offering unlimited free private repos for small teams. GitHub Actions provides integrated CI/CD with 2,000+ free build minutes per month, eliminating the need for a separate DevOps tool. Pull request workflows with required reviews, status checks, and merge queues enforce code quality standards without slowing down deployment velocity. GitHub Projects offers lightweight Kanban boards that sync with issues and PRs, giving startups a unified view of development progress without leaving the platform.

Product-led startups that need event-based analytics to track user behavior, retention cohorts, and conversion funnels without writing SQL. Mixpanel's strength is its session-level event tracking that captures every action users take — signups, feature usage, subscription upgrades, and churn events — and surfaces them in intuitive reports. The free tier includes 100,000 monthly tracked users, which covers most early-stage products. Startups can set up behavioral cohorts (users who completed action X and then did Y), build funnel analyses to identify drop-off points, and trigger in-product messages or emails based on user actions, all without a dedicated data team.

Startups that need a developer-first payment infrastructure with built-in subscription management, invoicing, and global payment acceptance. Stripe's APIs are the gold standard for SaaS billing — they handle recurring subscriptions, usage-based pricing, free trials, and prorated upgrades with minimal code. Stripe Billing manages the entire subscription lifecycle including automatic invoice generation, dunning for failed payments, and tax calculation for 100+ jurisdictions. Stripe Atlas lets founders incorporate, open a US bank account, and issue 83(b) election forms directly from the dashboard. Stripe Connect enables marketplace and platform startups to onboard sellers and handle split payments.