Junior.so
online
$100 free credit. YC-backed AI coding assistant for Slack & Teams.
Codeest. 2023 · San Francisco, CA
83
/ 100 APIVault Score
// At a glance
Free Tier
$100 free credit · 7 days · Claude Sonnet · no CC
Category
Code
Credit Card
Not required
Last Verified
just now
// Free tier details
Available Models
Claude Sonnet (free tier)
Monthly Requests
$100 free credit (7 days)
No credit card needed
No phone verification
// Quick start
# Junior is a Slack/Teams AI coding assistant — no API calls needed
# 1. Go to junior.so and connect your Slack or Teams workspace
# 2. $100 free credit is auto"text-amber-400">-granted (no credit card required)
# 3. Junior connects to your GitHub repos
# 4. Assign coding tasks directly in Slack/Teams chat
# Free tier limits:
# - Claude Sonnet model only
# - 1 Junior instance
# - 3 concurrent sessions
# - Credits valid for 7 days
# - One trial per workspace// Overview
Junior is a YC-backed AI coding assistant that lives in Slack or Microsoft Teams. New workspaces get $100 in free credits (auto-granted on connect, no credit card needed). Powered by Claude Sonnet on the free tier. Handles real coding tasks — PRs, bug fixes, code reviews — directly in chat.
// Pros
- $100 free credit, no credit card required
- YC-backed — real company, not a side project
- Handles real coding tasks (PRs, bug fixes, code reviews)
- GitHub integration included
// Cons
- Not a REST API — works via Slack/Teams only
- Free credit expires in 7 days
- Claude Sonnet only on free tier (not Opus)
- One trial per workspace
// Score breakdown
Reliability (35%) (from just now health check)100/100
Free Tier Generosity (30%) (computed from quota, no-CC, no-phone fields)85/100
Documentation (20%) (human rating)60/100
Popularity (15%) (GitHub stars (log-normalised), or manual baseline)72/100
Methodology: apivault.directory/methodology
// Best for
AI-assisted code reviews in SlackAutomated bug fixes via chatTeam coding workflows without leaving Slack
// Recent changes
Jun 13, 2026Added to APIVault — $100 free credit, YC-backed, no CCadded