💻 Software

10–20 hrs/wk

Browser Extension (Paid)

Build a Chrome or Firefox extension solving a specific problem. Charge one-time fee or subscription.

Startup cost: $300
Time to first $: ~90 days
Monthly ceiling: $8,000
Following: 2.2K

Overview

The ratings, in full

Difficulty

Startup cost

Income ceiling

Scalability

Time to first $

Who can help

JS Dev

Growth Loops

Support

Browse the expert directory →

Videos

10 walkthroughs worth watching

Economics

What the maths has to do

Monthly revenue target: $1,000
Subs needed at planning avg: 125
Estimated net per user per month: $4.50 – $14.00

Price points

One time: $10 – $29
Subscription: 5–15per month

Launch velocity

Week 2: MVP live to early users
Week 6 to 8: Premium enabled + store approvals complete

Monetization notes

External payments (Stripe/Paddle), as Chrome Payments are deprecated.
Offer free tier + paywall for premium actions to improve activation.

Budget

What it costs, line by line

Build to first sale: $100 – $1,000
Sales & marketing to $1k/mo: $300 – $800

Build budget breakdown

Lean

$100 – $250

The cheapest honest way in.

With tools

$350 – $800

Paid tooling where it buys back real time.

Fully loaded

$900 – $1,500

Everything bought rather than done yourself.

Lean — what you actually buy

Chrome Web Store dev fee
One-time developer account (Firefox free)
💡 Required for Chrome listing
$5
Editor & repo
VS Code + GitHub (private repo)
$0
Icons & branding
Icon pack/logo template or DIY assets
$15 – $60
Landing page
Carrd/Webflow basic (1–2 mo)
$19 – $38
Backend/serverless (optional)
Supabase/Cloudflare/Firestore free tier
$0
Analytics
PostHog/Amplitude free plan
$0
Error tracking
Sentry free starter
$0
Privacy/legal
Privacy policy/ToS template
$0 – $49
Contingency
Extensions, mock APIs, small tools
$20 – $50

With tools — what you actually buy

Chrome Web Store dev fee
One-time developer account
$5
Icons & branding
Premium icon/illustration packs
$40 – $120
Landing page
Carrd/Webflow (2–3 mo) + forms
$38 – $57
Backend/serverless
Starter plan for auth/db/edge functions
$10 – $25
Analytics
Event pipelines or session replays
$0 – $20
Error tracking
Sentry/LogRocket starter
$0 – $10
Cross-browser testing
BrowserStack 1 mo or local VMs
$0 – $39
Privacy/legal
Generator + cookie banner
$20 – $49
Promo graphics
Store screenshots/video
$50 – $250
Contingency
Misc tools and services
$20 – $50

Fully loaded — what you actually buy

Design & branding kit
Custom logo + full store creative
$250 – $500
Landing platform
Webflow CMS + integrations (3–4 mo)
$60 – $100
Backend/serverless
Paid tier (auth/storage/edge)
$25 – $60
Analytics suite
Product analytics + dashboards
$20 – $60
Error & session replay
Sentry/LogRocket paid
$20 – $50
Cross-browser testing
BrowserStack (2 mo)
$39 – $78
Legal package
Attorney-reviewed policies
$200 – $350
Store promo video
Pro motion piece
$150 – $300
Contingency
Tooling and unexpected fees
$100 – $200

Sales & Marketing budget breakdown

One k per month

$300 – $800Per month to sustain ~$1k/mo MRR/one-time revenue

Social ads (Reddit/Twitter)
Retarget + winning audiences
$150 – $300
Creator shoutouts / UGC
2–4 per month
$100 – $250
Email & onboarding
ESP + in-app prompts
$0 – $29
LP A/B tests
Variant screenshots/CTAs
$0 – $50
Community seeding
Guides and replies
$0 – $50

Target: Net ARPU ≈ $8 → ~125 active subs or one-time blends; CAC/LTV ≥ 1:3.

Ten k per month

$2,000 – $5,000Per month to drive toward ~$10k/mo

Paid acquisition scale
LI lead gen + Meta/Google remarketing
$800 – $2,200
Creator/partner program
Rev-share micro-influencers
$500 – $1,200
Content & case assets
Proof pages, video case studies
$200 – $600
Funnel tooling
Calendars, CRM, session replay
$100 – $300
Community ops
Moderator time, AMAs, giveaways
$200 – $700

Target: DAU/WAU lift; activation ≥ 35%, churn < 8% MoM; ≥ 1,250 subs @ ~$8 or equivalent one-time sales.

First 1000 total

$200 – $350Until first $1,000 total revenue

Product Hunt launch assets
Thumbnail, gallery, short demo
$0 – $100
Reddit/Twitter ads
Targeted ICP tests
$100 – $200
Creator shoutouts
1–2 micro placements
$0 – $80
Community seeding
Pinned guides in Reddit/Discord
$0 – $30

Target: ≥ 50–100 installs, activation ≥ 25–30%, ≥ 10 paid conversions or path to 125 subs.

What you’ll need

The kit, and what it runs you

JavaScript + browser APIsFree
Developer account (Chrome)$0 – $5one-time
Payments (Stripe/Paddle)Freeper month
Analytics & error tracking$0 – $20per month
Optional backend/serverless$0 – $25per month

Everything above: $0 – $50 to get started.

Recommended stack

Dev

VS Code

GitHub

Ship fast with feature flags

Data

PostHog/Amplitude

Sentry

Activation, funnels, errors

Backend

Supabase/Cloudflare/Firestore

Auth+KV if needed

Growth

Stripe/Paddle

Beehiiv/Mailerlite

Paywall + onboarding loops

BrowserStack (optional)

Cross-browser sanity

Checklist

8 steps, in order, costed

1
Identify pain point for knowledge workers
Build: FreeMarketing: Free
2
Build MVP extension (2–6 weeks)
Dev fee + basic assets + optional testing
Build: $24 – $187Marketing: Free
3
Launch free to get first users
Build: $0 – $60Marketing: $0 – $100

Step 4 is locked
Step 5 is locked
Step 6 is locked
Step 7 is locked
Step 8 is locked

5 more steps in the full playbook

Unlock the rest — plus progress tracking, the break-even calculator and every other playbook — for $120/year.

Unlock the full playbook

Risks

How this goes wrong

Platform/API changes can break the extension

Chrome/Firefox deprecations (e.g., Manifest V2/V3) or permission changes can disable features.

Watch these

Crash-free sessions
Lagging
Sessions without runtime errorsHealthy: ≥ 99%Act at: < 97%
Error rate
Leading
Errors per 1k sessionsHealthy: < 5/1kAct at: ≥ 10/1k
API watchlist coverage
Diagnostic
% key APIs monitored for deprecationHealthy: 100%Act at: < 80%

What to do

Track deprecation schedules; pin to stable manifests.
Automated error reporting + canary channel for early detection.
Fallbacks for changed permissions; graceful feature degradation.

Support burden across browsers

Different engines and user setups create edge cases; support load spikes after releases.

Watch these

Tickets per 1000 users
Leading
Support volume normalizedHealthy: < 8Act at: ≥ 15
Median first response time
Lagging
Minutes to first replyHealthy: < 120mAct at: > 240m
Self-serve solve rate
Diagnostic
% tickets resolved by docs/FAQHealthy: ≥ 35%Act at: < 20%

What to do

Add in-app diagnostics & templated bug reports.
Build self-serve help center & short Looms for common fixes.
Staggered rollouts with quick revert capability.

Crowded categories (hard to differentiate)

Many similar utilities; users churn if value isn’t immediate.

Watch these

Activation rate
Leading
Users reaching first ‘aha’ actionHealthy: ≥ 30–40%Act at: < 25%
7-day retention
Lagging
% users active at day 7Healthy: ≥ 25%Act at: < 15%
Time-to-value
Diagnostic
Minutes to first successful outcomeHealthy: < 5 minAct at: > 8 min

What to do

Laser-focused use case with measurable time saved.
Onboarding checklist + inline coach marks; no docs required.
Usage-gated paywall so value precedes the ask.

Timeline

What the first months look like

Week 1–2
- Pain point validated (≥ 10 interviews)
- Spec + MVP scope locked
- Dev account ready
Week 2–4
- MVP live to beta users (≥ 50 installs)
- DAU/WAU ≥ 20/50
- Activation ≥ 25–30%
Week 4–5
- Store approvals complete
- Public listing + launch assets
- First paying users
Week 6–8
- Premium enabled
- ≥ 125 active subs or revenue equivalent
- Churn < 8% MoM
- MRR ≈ $1k

Prioritize the smallest path to ‘aha’, then instrument paywall after value is proven.

Browser Extension (Paid)

The ratings, in full

Who can help

10 walkthroughs worth watching

What the maths has to do

Price points

Launch velocity

Monetization notes

What it costs, line by line

Build budget breakdown

Lean — what you actually buy

With tools — what you actually buy

Fully loaded — what you actually buy

Sales & Marketing budget breakdown

One k per month

Ten k per month

First 1000 total

The kit, and what it runs you

Recommended stack

8 steps, in order, costed

How this goes wrong

Platform/API changes can break the extension

Support burden across browsers

Crowded categories (hard to differentiate)

What the first months look like

Week 1–2

Week 2–4

Week 4–5

Week 6–8