1. Idea & Validation (0–3 months)
- Define problem, target customer, value proposition (Lean Canvas).
- Customer discovery: 20–50 interviews, validate pain and willingness to pay.
- Build low-fidelity prototypes or landing page + smoke tests (Adwords, email signups).
- Metrics to hit before next step: consistent positive signal (click-throughs, paid pilots, LOIs).
2. Pre-Seed / Friends & Family / Bootstrapping (3–9 months)
- Build MVP (usable product) and initial traction (early users, retention, revenue or letters of intent).
- Form founding team, incorporate, IP and equity splits, basic legal.
- Raise pre-seed (~$50k–$500k) to extend runway 6–12 months if needed.
- Milestones: working MVP, first paying customers or clear pilots, unit economics start to appear.
3. Seed Round (6–18 months after start)
- Goal: scale product, hire core team (engineer, growth/BD), prove repeatable acquisition.
- Raise seed (~$500k–$3M) from angels/seed funds.
- Deliverables for investors: CAC, LTV (or strong usage growth), churn, roadmap, defensibility.
- Milestones: scalable acquisition channel, >K users or meaningful revenue ($50k–$250k ARR typical benchmarks vary by sector).
4. Series A (12–36 months)
- Goal: product-market fit → scale growth and revenue, establish unit economics.
- Raise Series A ($3M–$15M+) for hiring, go-to-market, ops.
- Expectations: clear metric growth (monthly revenue growth, conversion funnels), repeatable sales process, retention cohorts.
- Milestones: ARR targets (often $1M+ ARR for many SaaS startups; consumer/marketplace differs), predictable growth and margins.
5. Series B / Growth Rounds (24–60 months)
- Goal: expand market share, geography, product lines; optimize operations.
- Raise Series B/C ($10M–$100M+).
- Focus metrics: revenue scale ($10M+ ARR common), unit economics, customer diversification, strong leadership team.
- Milestones: profitability pathway or dominant market position.
6. Later-Stage / Pre-IPO or Acquisition (4–8+ years)
- Goal: prepare for exit: IPO or acquisition.
- Raise growth equity if needed, finalize governance, compliance, financial controls.
- Milestones: sustained revenue growth, margins, audited financials, enterprise processes.
Cross-cutting actions (always)
- Fundraising prep: pitch deck, financial model, cap table, data room.
- Legal/finance: incorporation, contracts, payroll, taxes, option pool.
- Metrics & KPIs: choose metrics that match your model (ARR, MRR, CAC, LTV, churn, burn rate, runway).
- Networking: warm intros to investors, advisors, strategic partners.
- Fundraising cadence: start raising 4–6 months before runway ends; aim for multiple leads and term sheet comparisons.
- Governance: set board, investor communication cadence, clear use of funds.
Common timelines and amounts vary widely by industry and region. For specifics tailored to your sector (SaaS, marketplace, biotech, hardware), provide the industry and current stage and I’ll give a customized milestone checklist and target metrics.
Sources: Steve Blank & Bob Dorf, The Startup Owner’s Manual; Reid Hoffman & Chris Yeh, Blitzscaling; common VC guidance (a16z, Sequoia playbooks).