An honest comparison. Including where P6 wins.

When Primavera P6 is the right tool.

If you're running any of the following, P6 is genuinely better and we'd recommend it over KeraPlan without hesitation:

• Large infrastructure megaprojects. $1B+ LNG plants, nuclear, oil & gas, large transit systems, defence contracts. The scheduling complexity at this scale is what P6 was designed for.
• EPPM environments. Federated programme management with 50+ active projects, owner-mandated rollups, multi-organization collaboration through a central database. KeraPlan is a single-user desktop tool; this is the wrong shape for federated work.
• Owner-mandated tooling. Some owners (national infrastructure agencies, large utility companies, specific defence procurements) contractually require P6 as the scheduling tool. If your contract says P6, you use P6.
• Schedules over 20,000 activities. KeraPlan can technically open larger schedules but isn't optimized for them. For massive activity counts P6 is significantly faster.
• Specific P6-native features. P6's role-based resource leveling, code-driven activity flagging at enterprise scale, and Web Services API are deeper than KeraPlan's equivalents.

When KeraPlan is the right tool.

For the vast majority of projects in the world — the ones that don't make the financial press but still need professional scheduling — KeraPlan is built for exactly these situations:

• Commercial buildings, civil works, industrial retrofits in the $5M–$500M range, where you need real CPM and risk analysis but a full P6 deployment is overkill.
• Subcontractors handed a P6 schedule. You need to read the GC's XER file, plan your scope against it, and produce a defensible internal schedule — without paying $3,000/year per seat for a tool you'll use occasionally.
• Owners and EPCM firms doing independent reviews. Validate contractor submittals, run independent Monte Carlo analysis on critical paths, produce schedules for owner reports — without standing up an EPPM environment for one team.
• Independent schedulers, consultants, and forensic analysts. Register once, use it on every project. No per-project licensing math, no procurement cycle.
• Smaller GCs and construction firms who do good scheduling work but can't justify a P6 site license. KeraPlan brings the core 90% of P6's professional capabilities at zero cost, with no procurement process or subscription commitment.

Try both. We mean it.

If you're seriously evaluating scheduling software, do this:

1. Get a P6 trial from Oracle, or use an existing seat at your firm. Pick a real schedule from a recent project.
2. Get the free KeraPlan license. Import the same project. Run a Monte Carlo. Build a WBS. Produce an EVM curve.
3. Compare what each tool was like to use, what each produced, and what each cost in your time and money over a year.

That's the only evaluation that matters. Your honest answer at the end of that exercise tells you which tool is right for your work — better than any comparison page (including this one) ever could.