SimaPro vs GaBi vs openLCA: Which LCA Software Do You Actually Need?
For a bioprocess team, the deciding question about LCA software is not which package is best but whether you need a verified study at all. Use a free screening tool to find your hotspots first, and only buy a commercial suite once you need a verified, publishable footprint. SimaPro and GaBi are the right answer for an EPD, a customer questionnaire with audit rights, or a regulatory submission. They are an expensive answer to "is it the aeration or the plastic?", which a screening model settles in an afternoon.
Key differences at a glance
- Commercial LCA suites: Full ISO 14040/14044 modelling with a licensed background database, uncertainty analysis and verification-grade output. Roughly €6,000–12,000 per seat per year.
- openLCA & free tools: openLCA is free and genuinely professional, but the database still costs money. Screening calculators skip the database entirely and answer a narrower question in minutes.
- Cost difference: A commercial seat plus database runs into five figures annually; openLCA is free software with a database licence of roughly CHF 1,650/yr; a screening calculator is free outright.
- Best for EPDs and verified footprints: Commercial suites
- Best for early process development and hotspot screening: Free tools
Side-by-side comparison
| Factor | Commercial LCA suites | openLCA & free tools |
|---|---|---|
| Licence model | Commercial licence, per seat, annual subscription | Open source (openLCA) or free web tool; no seat licence |
| Time to first usable number | Days to weeks — you build the process model node by node | Minutes for a screening tool; days for openLCA once a database is loaded |
| Background database | ecoinvent, Sphera MLC, Agri-footprint, EF — tens of thousands of datasets | openLCA supports the same licensed databases; free tools use open factors only |
| Learning curve | Steep. Expect formal training and weeks of practice | openLCA is comparably steep; a screening calculator needs no training |
| Bioprocess unit operations | None built in — a bioreactor, seed train and CIP cycle must be modelled from scratch | openLCA the same; a bioprocess-specific calculator has them as first-class inputs |
| Annual software cost | ~€6,100–7,800/yr per seat (SimaPro); GaBi is quote-only | £0 |
| Database cost | Usually bundled, but it is the bulk of the price | ecoinvent ~CHF 1,650/yr for openLCA; £0 for open-factor tools |
| Scales to a full ISO 14044 study | Yes — this is what they are for | openLCA yes; screening tools explicitly no |
| Third-party verification & EPD | Supported and widely accepted by verifiers | openLCA is accepted; screening output is not verifiable |
Values reflect typical published specifications. Your vendor's current datasheet takes precedence.
Commercial LCA suites in detail
Commercial life cycle assessment software packages are general-purpose environmental modelling environments. You define unit processes, connect them into a product system, attach a background database for everything upstream of your gate, choose an impact assessment method, and the software solves the inventory. SimaPro, published by PRé Sustainability, is the most widely used and is priced per seat on an annual subscription, publicly quoted at roughly €6,100–7,800 depending on plan. GaBi, now sold by Sphera as LCA for Experts, is quote-only and aimed at large manufacturers, with a proprietary content library running to tens of thousands of datasets. Umberto occupies similar ground with a stronger material-flow-cost angle.
How it works
The database is the product. The interface is largely a way of assembling licensed background data into a system and solving it. That is why price tracks database scope rather than features, and why the same software with a different database can return a materially different answer.
When Commercial LCA suites wins
Choose commercial life cycle assessment software when the output has to survive scrutiny: an Environmental Product Declaration, a customer sustainability questionnaire with audit rights, a CSRD or CDP disclosure, or a peer-reviewed publication. Also choose one when you need impact categories beyond climate, regionalised water scarcity, or defensible uncertainty analysis. If someone external will check your number, you need the database and the audit trail that comes with it.
openLCA & free tools in detail
openLCA, the free life cycle assessment software built by GreenDelta since 2006, is open source and is a genuinely professional tool rather than a stripped-down one. It supports the same impact assessment methods and the same commercial databases as the paid suites. The catch is that the free part is the software, not the data: a working ecoinvent licence through openLCA Nexus still costs on the order of CHF 1,650 per year. Separately, screening calculators answer a narrower question. They accept process parameters directly, build the inventory for you from open emission factors, and return a footprint plus a hotspot breakdown without any database licence at all.
How it works
Screening tools trade breadth for speed and transparency. Because they rely on openly licensed factors — US EPA eGRID and ElectricityLCI, IPCC global warming potentials, UK Government conversion factors — every number can be traced to a public source, which is rarely true inside a commercial background database.
When openLCA & free tools wins
Choose free tooling when you are deciding rather than reporting. Comparing single-use against stainless, testing whether a titer improvement or a grid switch moves the number further, or working out whether media or plastics deserve attention are all screening questions. A screening answer that is directionally right in an afternoon beats a verified answer in six weeks when the decision is which of two process options to develop.
Pros and cons
Commercial LCA suites
Advantages
- Full ISO 14040/14044 compliance and verifier acceptance
- Very large background databases covering upstream chemicals, energy and transport
- Complete impact category coverage, not just climate
- Built-in uncertainty and sensitivity analysis, and EPD output formats
Disadvantages
- Five-figure annual cost once database and seats are counted
- Steep learning curve; realistically needs a trained practitioner
- No bioprocess domain model — no seed train, CIP cycle or single-use assembly
- Background data provenance is often opaque to the end user
openLCA & free tools
Advantages
- openLCA is free, open source and professionally capable
- Screening calculators return a first number in minutes with no training
- Open factor sources mean every value is traceable and checkable
- Bioprocess-specific tools model titer, aeration, CIP and consumables directly
Disadvantages
- openLCA still needs a paid database for most serious work
- Screening output is not verifiable and cannot support an EPD
- Narrow impact coverage — often climate, energy and water only
- Open databases are thin for speciality chemicals and polymers
Which should you choose?
Pick based on the dominant constraint in your process. Most bioprocess decisions come down to three: scale, modality, and total cost of ownership.
You need an EPD or a verified product carbon footprint
An external verifier will check your background data, your allocation choices and your uncertainty treatment. Open factors and a screening model will not survive that review.
Choose Commercial suiteYou are choosing between two process configurations
Single-use against stainless, fed-batch against perfusion, or one site against another. You need the direction and rough magnitude of the difference, not a defensible absolute number.
Choose Free screening toolYou are an academic group publishing an LCA
You need methodological rigour and reproducibility but have little budget. openLCA with an educational database licence, or Brightway if you are comfortable in Python, covers this well.
Choose openLCAA customer has sent you a sustainability questionnaire
It depends entirely on whether they have audit rights. If they simply want a number and a method statement, screening plus a clear assumptions log is often enough. If they can audit, you need the real thing.
Choose Depends on audit rightsReal-world use cases
Typical setups where bioprocess teams have converged on one choice or the other.
Early process development, 200 L pilot
Nobody has committed to a process yet and there is no budget for a consultant. A screening calculator tells you within an afternoon whether aeration energy, media or single-use plastics dominates, which is enough to steer the next round of development.
Commercial mAb facility, 2000 L single-use
Cleanroom HVAC and water generation usually dominate at this scale, and a screening model will show that clearly. Once you are reporting the number externally, move to a commercial suite with a licensed database.
Precision fermentation scale-up
Feedstock and grid intensity drive the result, and both are well covered by open factors. Screening is often sufficient right up to the point of investor or customer disclosure.
CDMO responding to client questionnaires
Volume of requests matters more than depth. A repeatable screening model with a documented method handles most of them; escalate to a verified study only for clients with audit rights.
Want the screening number before you commit to LCA software?
The Bioprocess LCA Calculator builds the life cycle inventory from parameters you already have — titer, working volume, aeration, water and single-use masses. It returns kg CO2e per kg product, PMI, and a hotspot breakdown, with every emission factor showing its source and confidence tier.
Open the Bioprocess LCA CalculatorCost and lifecycle considerations
Capital cost (the probe/meter itself) + recurring consumables (membranes, electrolyte, calibration standards, single-use sensor patches) + indirect costs (labor for calibration/maintenance, lost batch risk from sensor drift). Tech A wins on capital; Tech B often wins on 3-year TCO.
The headline licence fee understates the real cost of commercial LCA software, because the expensive component is the background database rather than the application. SimaPro is publicly quoted at roughly €6,100–7,800 per seat per year depending on plan, Umberto at around €5,700, and Sphera's GaBi is quote-only. Treat all of these as indicative and get a current quote, because licensing models changed in 2025 and educational and multi-user terms differ substantially.
The larger and less visible cost is people. A commercial suite realistically needs a trained practitioner, and if you do not have one internally you are either hiring or buying consultancy days on top of the licence. That is the honest reason screening tools exist: not because they are more accurate, but because the fully loaded cost of answering a simple directional question inside a commercial suite is disproportionate to the question.
| Cost component | Commercial LCA suites | openLCA & free tools |
|---|---|---|
| Probe / instrument | €6,000–12,000 per seat per year | £0 |
| Consumables / year | Database licence, usually bundled but price-dominant | ecoinvent ~CHF 1,650/yr for openLCA; £0 for open-factor tools |
| Calibration labor / year | Trained practitioner, or consultancy days | openLCA still needs expertise; screening tools need none |
| 3-year TCO estimate | Five figures annually, before any consultancy | £0 to low four figures |
Vendor landscape
Major vendors in each camp, with one-line positioning notes.
Commercial LCA suites vendors
- SimaPro (PRé Sustainability): the most widely used suite; per-seat annual subscription, strong uncertainty analysis
- Sphera LCA for Experts (formerly GaBi): enterprise-focused, very large proprietary content library, quote-only pricing
- Umberto (iPoint): material and energy flow modelling with an eco-efficiency and costing angle
openLCA & free tools vendors
- openLCA (GreenDelta): free and open source, professionally capable, databases sold separately via Nexus
- Brightway + Activity Browser: Python framework for researchers who need full control and reproducibility
- ACS GCI Biopharma PMI Calculator: free, industry-endorsed mass-intensity metric for biologics; mass only, not CO2e
Frequently asked questions
Which is better, SimaPro or GaBi?
Is openLCA really free?
Do different LCA software tools give different answers?
Can I use a free LCA tool for an Environmental Product Declaration?
What LCA software do biotech and pharma companies use?
How much does LCA software cost per year?
What is the fastest way to get a carbon footprint for a fermentation process?
Do I need LCA software at all if I only want a carbon number?
Resources and references
- Herrmann & Moltesen (2015), Does it matter which LCA tool you choose? — Journal of Cleaner Production. The canonical comparison of SimaPro and GaBi on identical systems.
- Alves et al. (2025), No One-Size-Fits-All: A Systematic Review of LCA Software — Sustainability. Systematic review plus a selection framework across current tools.
- ACS GCI Pharmaceutical Roundtable tools — Free Biopharma PMI and PMI-LCA calculators, industry-endorsed and no login required.
- openLCA — The open-source suite itself, plus the Nexus database repository.