Best AI Tools for AI Writing Assistants in Construction

Draft RFIs, letters, and reports: 5 tools with short, honest verdicts. Prices change often, so anything marked verify needs checking on the vendor's site.

ChatGPT

For: Anyone who writes RFIs, emails, or narratives. Good at: Flexible drafting. Handles pasted spec text and photos. Has voice input. Falls short: Can be confidently wrong about codes and contracts. Don't paste confidential docs unless your company allows it.

Price: Free tier; paid plans from about $20/mo (verify) · Phone-friendly: Yes

Claude

For: PMs working with long specs or contracts. Good at: Handles long documents well. Clear writing. Falls short: Same accuracy caveats as any chatbot. Usage limits on the free tier.

Price: Free tier; paid from about $20/mo (verify) · Phone-friendly: Yes

Google Gemini

For: Teams already on Google Workspace. Good at: Works inside Gmail, Docs, and Drive. Falls short: Works best inside the Google ecosystem. Check what your Workspace plan includes.

Price: Free tier; paid tiers (verify) · Phone-friendly: Yes

Microsoft Copilot

For: Offices running Outlook, Word, Excel, and Teams. Good at: Drafts inside Office apps and can summarize Teams meetings (depending on license). Falls short: Full features need a paid Microsoft 365 add-on. Results depend on how tidy your files are.

Price: Free consumer version; M365 Copilot add-on per user (verify) · Phone-friendly: Yes

Perplexity

For: Anyone researching products, standards, or manufacturers. Good at: Answers come with source links you can check. Falls short: Sources can be outdated or weak. Always open the link. Not a code authority.

Price: Free tier; Pro about $20/mo (verify) · Phone-friendly: Yes

Last updated 2026-10-15.