1. Publicly Reported
OSS Donations | - DrupalCon Diamond Sponsor (10 years @ \$100K/year): ~\$1,000,000.
- “Gift of Open Source” (2021): \$10,000 total (~\$5K to Drupal Assoc., \$5K to WP Foundation).
- Other Sponsorships (Twisted, Let’s Encrypt, WP-CLI, etc.): ~\$10K–\$30K over multiple years (not all amounts disclosed).
- Approx. total direct OSS sponsorship:
\$1,000,000 (DrupalCon) + \$10,000 (Gift of OS) + \$10–30K (other) = ~\$1.02–\$1.04 million
| - DrupalCon Diamond Sponsor (10 years @ \$100K/year): ~\$1,000,000.
- DrupalCares Matching (2020): \$100,000.
- PHP Foundation (2021): \$25,000.
- Mautic Seed/Incubation: \$250,000+ (staff, branding, etc.).
- Approx. total direct OSS sponsorship:
\$1,000,000 (DrupalCon) + \$100,000 (DrupalCares) + \$25,000 (PHP) + \$250,000 (Mautic) = ~\$1.375 million
|
2. Estimated Developer
FTE Costs | - ~4–5 FTE dedicated to open source (Drupal, WP-CLI/Drush, Linux/systemd, etc.).
- Fully loaded cost per dev: ~\$130K–\$160K/year.
- Total: \$520K–\$800K/year for OSS dev staff.
- Over ~8–10 years: ~\$4–\$8 million in developer labor.
| - ~20 FTE on Drupal core (sometimes more) + 2–3 on Mautic.
- Fully loaded cost per dev: ~\$130K–\$160K/year.
- Drupal alone: ~\$2.6–\$3.2M/year. Over 10+ years: \$26–\$32M+.
- Mautic adds another ~\$300K–\$500K/year, so total possibly \$30M+ over a decade.
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3. Grand Total
(Donations + Dev Costs) | - Direct OSS donations: ~\$1.0–\$1.04M
- Developer labor: ~\$4–\$8M (over several years)
- Combined range: ~\$5–\$9 million
(since Pantheon’s founding)
| - Direct OSS donations: ~\$1.375M
- Developer labor: \$26–\$32M+ (Drupal) + extra for Mautic
- Combined range: ~\$27–\$33 million+
(since Acquia’s founding)
|
4. Total Venture
Funding Raised | ~\$200M (Series E in 2021 and prior rounds). | ~\$185M (pre-2019, before Vista Equity acquisition). |
5. Approx. % of
Funding Spent on OSS | If \$5–\$9M spent on OSS vs. \$200M total raised:
~2.5–4.5% (very rough estimate). | If \$27–\$33M+ spent on OSS vs. \$185M total raised:
~15–18% (rough estimate). |
