Your AI API bill,
before it becomes a problem.
Connect your OpenAI, Anthropic, or Google AI keys. See real-time spend. Get Slack or Email alerts when you're about to blow your budget. No tracing. No evals. No complexity.
No credit card required
Built for solo devs & teams under 10 people
You shouldn't find out you overspent when the invoice lands.
AI API costs are invisible until they're not. That's the problem.
The $2,000 surprise
You shipped a new feature. It worked. Then your OpenAI bill tripled overnight. No alert. No warning. Just a credit card charge you didn't see coming.
62% of AI builders have been surprised by an API bill at least once.
AI agents spend faster than humans
One agent loop. One unconstrained tool call. One recursive chain. Your $50/month budget becomes $500 in a single afternoon.
Agent workloads can spike API spend by 10–100x with zero warning.
Observability tools are overkill
LangSmith, Langfuse, Helicone — they're powerful, but they're built for teams with dedicated LLMOps engineers. You just want to know what you're spending.
Average setup time for full LLM observability: 2–5 days. SpendWatch: 5 minutes.
Three steps. Five minutes. Done.
You don't need to instrument your code or deploy a tracing server.
Connect your API keys
Paste your OpenAI, Anthropic, or Google AI API key. SpendWatch reads your usage data directly from each provider's API. No code changes. No SDK. No proxy.
Read-only access. We can't make API calls on your behalf.
Set your budget thresholds
Daily, weekly, or monthly budgets. Per-provider or total. One number per threshold. We handle the math.
Pro tip: set your first alert at 80% of your usual spend.
Get alerted. Stay calm.
Email. Slack DM. Slack channel. Pick your channel. When spend crosses your threshold, you'll know within 5 minutes — not 30 days.
Or just check the dashboard whenever you're curious.
Everything you need. Nothing you don't.
SpendWatch does one thing exceptionally well: AI API cost monitoring.
Real-time spend dashboard
Per-provider, per-model, per-day breakdown. See exactly where your money goes — updated every 15 minutes.
Budget alerts
Set thresholds for daily, weekly, or monthly spend. Get notified via Slack DM, Slack channel, or Email when you cross them.
Weekly spend reports
Automated email every Monday morning: total spend, top models, cost trend vs last week. Forward to your co-founder or client.
Unlimited API keys
Pro plan: connect as many keys as you have. Staging. Production. Side project. Personal. All in one dashboard.
Multi-provider
OpenAI. Anthropic. Google AI. Together. More providers added as they become popular. Request yours in the app.
Your keys stay yours
API keys are encrypted at rest. Read-only access only. We never proxy your API traffic. We never see your prompts or completions.
The LLM observability tools do too much.
You need a cost alarm, not a mission control center.
LangSmith, Langfuse, Helicone, Arize Phoenix, Portkey, Braintrust, Lunary — they're all racing to build the complete LLM engineering platform. Traces. Evals. Prompt management. Guardrails. Agent debugging. Datasets. Fine-tuning feedback loops.
That's great if you're a 50-person AI team with a dedicated LLMOps engineer. But if you're a solo builder shipping an AI feature, or a 3-person startup using OpenAI and Claude, you don't need any of that.
You need one thing: Don't let me overspend without telling me.
That's SpendWatch.
| SpendWatch | LangSmith | Langfuse | Helicone | |
|---|---|---|---|---|
| Setup time | 5 min | 2–5 days | 1–3 days | 1–2 hrs |
| Cost focus | ★★★ | ★☆☆ | ★★☆ | ★★☆ |
| Tracing | — | Full | Full | Full |
| Evals | — | Full | Full | Partial |
| Free tier keys | 3 | N/A | N/A | 1 org |
| Starting price | Free | $39/seat | $29/mo | $79/mo |
| Best for | Solo devs, small teams | LangChain teams | Eng teams | Growing AI cos |
| Self-hosted | N/A | No | Yes | Yes |
Free to start. $9/month when you need more.
One plan. Simple pricing. No per-seat tax. No usage metering.
Free
- ✓Up to 3 API keys
- ✓Real-time spend dashboard
- ✓1 budget alert (Email only)
- ✓Daily spend tracking
- ✓OpenAI, Anthropic, Google AI
Pro
- ✓Unlimited API keys
- ✓Real-time spend dashboard
- ✓Unlimited budget alerts
- ✓Slack DM + Slack Channel + Email alerts
- ✓Weekly spend reports
- ✓All providers (including future additions)
- ✓Priority support
Frequently asked questions
What happens when I hit 3 keys on Free?▾
You'll see a gentle prompt to upgrade. No data is deleted. No alerts are disabled for your existing keys.
Do you charge per seat?▾
No. Pro is $9/month per organization. Invite your whole team. No per-user tax.
Can I cancel anytime?▾
Yes. Downgrade to Free with one click. Your data stays accessible.
What providers do you support?▾
OpenAI, Anthropic, Google AI at launch. Azure OpenAI, Together AI, and Groq coming next. Request a provider in the app.
Know what your AI APIs cost. Before it's too late.
Join the waitlist. We're launching to the first 100 builders in August 2026. Free plan available at launch.
No spam. One email when we launch. Unsubscribe anytime.
🚀 Be among the first builders on the waitlist