Persona: a saved role
Startup Founder
Validate the idea, raise the round, grow the company.
Test an idea, calculate how long your cash will last, or draft an investor update. Plexon helps compare growth and fundraising choices with built-in calculators. Legal and equity examples start with US conventions; guidance is general, not legal, tax, or financial advice.
Try a starting prompt
These examples appear in a new chat when you choose this persona.
“Pressure-test my startup idea and design three Mom Test interviews”
“Do we have product-market fit yet, and how would we measure it?”
“Runway on 500k cash and 60k monthly burn, growing 8% a month?”
“A 500k SAFE on a 10M post-money cap, what does the investor own?”
“Model our founder dilution through Seed and a Series A”
“Review our unit economics, CAC 400, ARPA 50, 80% margin, 3% churn”
“Set up a CRM for my startup and track our sales pipeline”
How it helps
Work through the numbers
Calculates cash runway, customer economics, and ownership changes from the figures you supply.
Prepare for professional review
Equity and fundraising calculations are illustrative. Decisions that move money or ownership need review by a startup lawyer and accountant.
Know which market the example assumes
Labels US legal and equity conventions and notes where other markets differ.
Challenge the plan
Helps identify weak assumptions in an idea, a growth measure, or a fundraising term and explains its concerns.
Setup and included toolsSee what the role adds and which accounts you may need.
Planning tools
Built-in calculators cover runway, unit economics, SaaS metrics, SAFE conversion, dilution, and vesting. The Founder Cockpit dashboard puts business figures on one page. Workflows, saved steps for recurring work, include a runway watch, weekly metrics digest, and monthly investor update draft.
US legal and equity examples
Examples start with the YC post-money SAFE, the Delaware C-Corp, and the 83(b) election. They are a starting point for discussion with your advisers.
Choosing this persona adds the following items to your workspace. It keeps your existing accounts and settings. Connections use your own accounts; content needed for a request is sent to the AI service or connected app handling it. The names below match the items in Plexon.
Agents
Assistants that handle specific parts of a task.
- startup-fundraising-advisor
- startup-finance-modeler
- startup-gtm-strategist
- startup-idea-validator
- growth-hacker
- product-manager
- analytics-reporter
- finance-tracker
- feedback-synthesizer
Plugins
Bundles that add tools and skills to Plexon.
This role uses the built-in features without adding plugins.
Suggested connected apps
Apps and services you can connect with your own accounts.
- stripe
- notion
- linear
- posthog
- twenty
Skills
Saved guidance for specific tasks.
- startup-ideation-validation
- startup-product-market-fit
- startup-fundraising
- startup-equity-cap-table
- startup-go-to-market
- startup-metrics-unit-economics
- startup-company-building
- startup-founder-toolkit
- crm-builder
- video-composer
- brag
Dashboards
Pages that bring useful figures and controls together.
- Founder Cockpit
Workflows
Saved steps for recurring work. Review them before enabling them.
- Runway watch
- Weekly metrics digest
- Monthly investor update draft
Read the exact role instructionsThe opening instruction, an excerpt, and advanced customisation.
The role’s opening instruction, verbatim
“You are Plexon's Startup Founder persona, an operating partner for a founder building a company from idea to scale, helping with strategy, fundraising, product, metrics, and the company itself.”
Excerpt from the role’s instructions, verbatim
Use the calculators for any number, never guess a rate. The equity, cap-table, and term-sheet math is illustrative; for anything that moves real money or goes in a filing, confirm with a startup lawyer and an accountant. US-default for legal and equity, but flag it. Benchmarks (LTV:CAC near 3:1, payback under 12 months, the Rule of 40, 18 to 24 months of runway) are rules of thumb, not laws. Be honest: most startups do not reach Series A.
Plexon includes these instructions in the conversation while this persona is active. You can replace them with your own: add a system_prompt: field to your persona file under ~/.plexon/personas/.
Try another persona
Choose a different saved role as your work changes.
Start using the Startup Founder persona
Install Plexon, open the Personas panel, and choose Startup Founder. Your next message uses this role’s instructions.