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Pro Plan

The complete Stru AI experience for professional engineering teams. Share across unlimited seats, access all features, and scale as you grow.
Beta Pricing: During the beta period, certain module features and pricing structures may be adjusted. You’ll be notified before any changes take effect.

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Pro Plan Features

Pro Plan

$500 / monthIncludes 500 requests per month
  • Team shared pool - Unlimited seats, shared quota
  • Base Model - Mathcad Module + Building Codes (ACI, AISC, ASCE)
  • Built-in Tools - USGS seismic lookup, wind data, self-learning
  • Private Knowledge Base - Up to 100 documents
  • Beta Module Access - RISA 3D & SAP2000 (during beta)
  • Email Support - 24-hour response time
  • Monthly billing - Cancel anytime

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What’s Included

Unlimited Seats

Your entire team shares the request pool. No per-seat fees.

All Building Codes

Access to 22+ codes: ACI, AISC, ASCE, Eurocodes, AS, CSA

Mathcad Module

Generate, edit, QC Mathcad Prime 9+ files

Private Knowledge Base

Upload firm standards, templates, project docs

Self-Learning

Agent adapts to your firm’s style over time

Email Support

Technical support with 24-hour response

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Top-Up Requests

Need more requests? Purchase additional request packs that never expire:

100 Requests

$100$1.00 per requestNever expires

500 Requests

$450$0.90 per request10% savings

1,000 Requests

$800$0.80 per request20% savings
How top-ups work: Monthly quota is used first, then top-up credits. Monthly quotas reset each billing cycle. Top-up credits never expire.

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What is a Request?

Understanding how requests are counted ensures transparent, predictable billing.

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Basic Request Model

Each time you send a prompt to the Agent, that counts as 1 request.Examples:
  • “Design a post-installed anchor per ACI 318-19” → 1 request
  • “Add a deflection check to the existing calculation” → 1 request
  • “QC this Mathcad file for high-seismic requirements” → 1 request
The Agent then uses its tools to complete your task and responds.
The Agent uses specialized tools to perform tasks (read files, write calculations, validate code compliance, etc.).Mathcad Module (included in Base Model):
  • First 10 tool calls per request: No additional charge
  • Each additional 5 tool call block: +1 request
Note: During Beta, unlimited tool calls are waived for testing purposes.
Example: You ask the Agent to generate a complex concrete calculation. The Agent uses 23 tool calls to complete it:
  • First 10 tools: Free
  • Next 5 tools (11-15): +1 request
  • Next 5 tools (16-20): +1 request
  • Final 3 tools (21-23): +1 request
Total cost: 4 requests (1 for your prompt + 3 for extended tool usage)
You’re only charged for successful requests. If the Agent encounters an error, fails to complete, or a tool call fails, you are not charged.This ensures you only pay for value delivered.
Behind the scenes, AI models charge by token usage (input/output text). We handle all token management and bill you simply in “requests.”You don’t need to:
  • Track token counts
  • Manage context windows
  • Optimize prompt length
  • Worry about LLM pricing changes
We absorb the complexity and provide simple, predictable pricing.
Fair Use Policy: Applies to exceptionally large inputs designed to stress-test the system. Typical engineering reports and documents are well within acceptable limits. Don’t inject 50,000 words in a single prompt, and you’ll be fine.

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Common Questions

When your monthly quota is exhausted, the Agent will notify you and prompt you to purchase a top-up pack.
  • You can buy top-ups instantly through your dashboard
  • Top-up credits never expire
  • You can pre-purchase top-ups before running out
No work is lost - you can resume immediately after adding credits.
Monthly quota: No, unused requests from your $500/month plan do not roll over. They reset each billing cycle.Top-up credits: Yes! Top-up request packs never expire and roll over indefinitely.
Strategy: Purchase top-ups during slower months to build a reserve for busy periods.
Yes! The Standard Plan includes unlimited seats. Your entire team shares the request pool.Benefits:
  • No per-seat licensing fees
  • Flexible team scaling
  • Shared Private Knowledge Base
  • Centralized billing
Example: 10 engineers on one 500/monthaccount=∗∗500/month account = **50/engineer/month**
Your dashboard shows:
  • Requests used this month
  • Requests remaining in monthly quota
  • Top-up credits available
  • Usage history and trends
  • Per-user breakdowns (optional)
You’ll receive notifications at 80% and 100% of monthly quota.

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Free Trial

14-Day Free Trial

Try Stru AI risk-free with 50 requests
  • Full access to Base Model (Mathcad Module)
  • Access to Private Knowledge Base (up to 10 documents)
  • Email support
  • No credit card required
Start Free Trial →

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Ready to Get Started?

1

Estimate Your Usage

Think about how many calculations or code lookups your team does per week. Multiply by 4 for monthly estimate.
2

Start with Standard

Most firms start with the Standard Plan ($500/month, 500 requests) and add top-ups as needed.
3

Monitor and Adjust

Track your usage in the first month. If you consistently exceed 1,000 requests, consider Enterprise.
4

Contact Us

Email bhosh@stru.ai if you need help estimating usage or have questions about Enterprise options.