Score your idea. Pick your stack.

Is this idea worth building?
Find out before you write a line of code.

StackSleuth scores your idea on moat, feasibility, and pain — then picks the right tools to build it. Pricing diffs, uptime probes, and integration depth included.

✕ pricing changed mid-trial
✕ free tier breaks at 1k users
✕ auth locked you in
✕ reviews were 8 months stale
✕ migration cost 3 weeks
Score your idea →Agent-ready API & MCP
Stack recommendation — demo
evidence-backed
// describing your appA SaaS for small teams to track projects. Need auth, DB, email, hosting. Solo founder, under $50/mo.
Built with StackSleuth

This is StackSleuth's own stack — scored by StackSleuth. Every choice evidence-backed. Every warning surfaced.

Overall score
91
weighted composite
Monthly cost
$47
at launch · scales ~$180 at 10k users
Components
3
3 verified
Warnings
1
1 pricing flag
Get MCPnew
New idea
Recommended stack — 3 components matched
Auth
Clerk
97
fit score
Security ↑↑Vendor Risk ↑↑Cost ↑Scale ↓
Cost
100
Reliability
98
Scalability
85
Security
95
Lock-in
91
Dev XP
88
Cost
Free tier reality
100
Price stability
100
Scale cost curve
82
Lock-in & Viability
Migration pain
91
Org viability
85
sources: pricing diff · docs parse · status probe · AOE ×38as of Mar 2026 · 4 sources · confidence: high
↗ view full evidence card
✓ price stable 14mo
Database + Vector
Supabase
94
fit score
Reliability ↑↑Scalability ↑↑Lock-in ↑Security ↓
Cost
91
Reliability
97
Scalability
93
Security
80
Lock-in
88
Dev XP
86
Reliability
Observed uptime
99.8%
SLA vs actual
95
MTTR
82
sources: status probe · pricing diff · gh activity · docs parse · AOE ×91as of Mar 2026 · 5 sources · confidence: very high
↗ view full evidence card
✓ 19/22 integrations verified
Hosting
Railway
81
fit score
Cost ↑↑Reliability ↑Scale ↑Security ↓
Cost
63
Reliability
91
Scalability
85
Security
75
Lock-in
93
Dev XP
89
sources: pricing diff Feb 14 · docs parse · AOE ×22as of Mar 2026 · 3 sources · confidence: medium
↗ view full evidence card
⚠ pricing changed Feb 14
Stack compatibility⚠ 1 flag
✓Clerk ↔ SupabaseNative integration · shared JWT · verified AOE ×14verified
✓Supabase ↔ RailwayStandard Postgres connection · no lock-in · env vars onlyverified
✓Clerk ↔ RailwayNo direct dependency · env var config · no conflicts in AOE datainferred
⚠Railway pricingChanged Feb 14 — recheck your cost model at 10k usersunstable
Overall stack fit score: 91 · 4 pairs checked · 1 flagmethodology →
— idea analysis —
Product viability — idea scored

Separate from stack scoring — this is about the idea, not the tools.

74
Moat
defensibility · network effects · compounding advantage
Structurally defensible
data + methodology · moderate
Data network effects88
Methodology depth81
Incumbent absorption risk58
Switching cost growth79
Community flywheel62
81
Feasibility
buildability · cost to launch · distribution path
Buildable solo
lean stack · clear wedge
MVP buildability88
Launch cost91
Distribution clarity84
Cold start difficulty62
Revenue before scale79
88
Painkillerness
demand urgency · hair-on-fire · willingness to pay
Hair on fire
active pain · budget exists
Active search demand92
Budget already exists85
Quantifiable pain cost88
Recurrence frequency91
Pain trajectory82
81
overall viability

Painkillerness (88) and Feasibility (81) are both high — the pain is real, the budget exists, and it's buildable solo under $50/mo. Moat (74) is the honest concern: incumbent absorption risk is moderate, and the community flywheel is unproven. The data network effect is your defence — it compounds over time but needs volume first. Cold start is your hardest near-term problem.

data moat compoundslean stackactive pain
Competitive landscape — scored on same dimensions◈ you are here
ProductOverallMoatFeasibilityPainkillernessStatusGap / note
StackSleuthyou
Evidence-backed stack picker
81
74
81
88
◈ buildingFirst to combine pricing diffs, uptime probes, and compatibility in one evidence layer.
G2 / Capterra
Review aggregator
62
85
70
45
✓ liveReviews are stale. No pricing diffs, no compatibility. Proves demand for tool discovery.
Tooljet / Retool
Low-code builder
72
75
85
78
✓ liveBuild apps, not pick stacks. No registry, no compatibility scoring. Different wedge.
StackShare
Stack showcase
58
55
75
52
~ stalledUser-submitted stacks, no scoring. Good for inspiration, not for evidence-backed picks.
AI code assistants
LLM recommendations
68
45
90
82
✓ liveHallucinate tool names. No pricing diffs, no uptime probes. StackSleuth feeds them.
◈
New entrant spotted: Turso (SQLite-native edge DB) — 47 agent observations, shipping fast, generous free tier. Thin evidence card but trending for your use case. View →
Try StackSleuth — live
Stack builder — AI + manual hybrid
live · evidence-backed
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Why StackSleuth
01
🧾
Evidence, not opinions
Pricing diffs, uptime history, integration depth, migration pain. All verified. All timestamped. If it changed, we caught it.
02
⬡
Small players surface automatically
No sponsored slots. New tools are auto-discovered from GitHub, npm, ProductHunt. If it's good and it exists, it gets a card. No marketing budget needed.
03
◈
Agent-readable by design
Structured evidence cards + MCP API. The same ground truth you're reading, queryable by your agents.
Pricing

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Start free. Upgrade when it saves you from the wrong choice.

Free
Try before you commit
$0
forever
ModelClaude Haiku
Stack builds3 lifetime
MCP queries3 / day
Saved stacksnone
✓Full stack recommendations — all 6 scored categories
✓Compatibility checker — verified + inferred pairs
✓190+ tool registry — browse and filter
✓MCP read-only — recommend + compare tools
–Viability scoring (Moat / Feasibility / Pain)
–Pricing change alerts
–Export to Cursor prompt
Start free →
Most popular
Pro
For serious builders
$19
/ month
 
ModelClaude Sonnet+ Haiku available
Stack buildsunlimited
MCP queries500 / day
Saved stacks5 stacks
✓Everything in Free
✓Full viability scoring — Moat, Feasibility, Painkillerness with sub-scores
✓Competitor landscape — scored on same dimensions
✓Export to Cursor — one-click prompt generation new
✓Pricing change alerts — notified when your stack changes
✓MCP full access — all tools incl. score_idea
✓Save + share builds — shareable link for every build
–Rework with AI Team
Get Pro →
Team
For studios + agencies
$49
/ month
 
ModelClaude Opus+ all models
Stack buildsunlimited
MCP queriesunlimited
Seats3 included
✓Everything in Pro
✦Rework with AI — Claude refines your idea into a stronger one Team
✦Stack comparison mode — same idea, different constraint sets side by side
✦Full model selector — Haiku → Sonnet → Opus per build
✦Unlimited saved stacks — full build history
✦STACK.md export — commit evidence to your repo
✦Priority registry updates — see pricing changes first
Get Team →
⬡
MCP server — attach StackSleuth to Cursor, Claude, or any agent
One config line. Your AI agent queries the registry mid-conversation. sb.recommend_stack() · sb.score_idea() · sb.check_stability()
Free · 3/dayPro · 500/dayTeam · unlimited
No contracts. Cancel any time. Questions? Read the FAQ → ·  All prices USD  ·  Billed via Stripe
PMF-001 // one question
Does this solve your problem at a price you can afford?
Honest answers only. This shapes what we build first.