Model your legacy modernisation project in 60 seconds. Adjust the variables and we'll show you the true cost, your savings, and your ROI.
Project parameters
Engineering team size30 engineers
Engineers allocated to the migration
Average annual salary$120K
Fully-loaded cost per engineer (incl. benefits)
Project duration12 months
% time on migration30%
Fraction of each engineer's time on migration vs. other work
Bosun speed multiplier5×
How many times faster Bosun completes the migration vs. manual. Typical: 3.5–8×, up to 15×
Bosun cost = platform fee + €5/seat/month × migration duration (months ÷ speedup). Business €80/mo · Scale €800/mo · Enterprise ~€8K/mo — see Pricing for full details.
Return on Investment
43×
Payback in 8.4 months
Bosun plan:Business
Cost Without Bosun
$1,260,000
Over 12mo
Cost With Bosun
$882,000
$73,500/month
Total Savings
$378,000
FTE Equivalent Freed
4 devs
Redeployed to product work
Cost breakdown
Manual cost (without Bosun)$1,260,000
Bosun platform cost (plan + seats)$882,000
Token overage (€3.65/1M above plan bundle)$0
Net savings$378,000
Estimates based on 30 engineers × 30% allocation × $120K salary over 12 months.
Speed multiplier 5×. Cloud/SaaS pricing. Actual results vary by project scope and stack.
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We'll send a detailed breakdown with your specific stack in mind.
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Deterministic output
AST-mapped migrations with no hallucinated diffs and no regressions introduced by guessing.
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Zero vendor lock-in
BYO LLM. Deploy to your infrastructure. Full IP ownership stays with you.
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Full lifecycle
From codebase audit to post-migration monitoring. Not a one-shot prompt.