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  • ArticlesField notes and playbooks from working presales engineers.
  • Reference LibraryGuides, glossaries, and frameworks you can cite on a call.
  • BooksVerified titles from the Alliance, with member reviews.
  • ResourcesTemplates, checklists, and downloads for your next deal.
  • CertificationThree earned levels, from Associate to Excelsior.
  • Skills AssessmentFree ten-minute benchmark of your presales skills.
  • Positioning QuizzesScenario-based placement for SEs, SAs, and TMEs.
  • MembershipLevels, dues, and what each tier unlocks.
  • Free Tools HubEvery calculator and planner, free in your browser.
  • Log Volume CalculatorSize EPS, storage, sensors, and bandwidth for syslog.
  • Commission CalculatorTrack attainment, accelerators, and payout timing.
  • IP CalculatorSubnets, CIDR, and host ranges without the math.
  • AboutWho we are and why the Alliance exists.
  • Alliance OverviewThe mission, the community, and how to join.
  • JobsPresales roles with no ATS — tick interested, recruiters reach out.
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Free Tools

Practical calculators for sales engineers and presales professionals — free to use, no account needed.

IPv4 Address & Subnet Calculator

Network, broadcast, host range, masks, wildcard masks, special-use ranges, and subnet splitting — for any IPv4 address and prefix.

SOC Coverage Planner

Work out how many analysts true 24/7 coverage requires, how much an in-house SOC costs, and how that compares to an MDR subscription.

Commission Calculator

Model OTE, commission rates, attainment payouts, and accelerators — so you can explain a plan to a rep or sanity-check an offer.

EPS Calculator

Size a SIEM or logging platform in events per second — average and peak EPS, daily event volume, and retention storage.

Technical Sales AllianceTechnical Sales Alliance

Join Technical Sales Alliance to earn a recognized credential, sharpen your presales skills, and get in front of hiring managers. Start with the free skills assessment, then bring your team along for the ride.

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Membership, credentials, and presales tools for technical sellers.