Accounting · head to head
Causal vs Lago
Causal
Accounting
Formula-based financial planning and modelling, now sold as Lucanet xP&A
- From
- On request
- Rated
- -
Lago
Accounting
Open-source billing infrastructure for usage-based models
- From
- Free
- Rated
- -
The short version
- Only Lago has a free tier, so it costs nothing to try first.
- Each has a real cost: Causal causal was acquired by Lucanet on 31 October 2024 and the independent brand has been retired in favour of Lucanet xP&A, so the roadmap, support and pricing you buy are Lucanet’s and not the ones the product built its reputation on.; Lago free tier limited to 10,000 entities per month with 5M event cap
- They diverge on capability: Causal covers Variable-based modelling, Lago covers Real-time usage metering.
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which Causal and Lago actually diverge.
Identical on both: user rating (Not yet rated), category (Accounting).
What each one covers
Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.
Only in Causal
- Variable-based modelling
- Dimensional breakdowns
- Scenario and range inputs
- Actuals integration
- Interactive dashboards
- Version history
- Spreadsheet import
- Workforce and headcount planning
Only in Lago
- Real-time usage metering
- Multiple pricing models
- Automated invoicing
- Prepaid credits
- Entitlements
- Multi-currency support
- Payment orchestration
- Revenue analytics
What people use each for
The jobs each tool is most often brought in to do.
Causal
- A finance team whose three-statement Excel model has become too fragile to change safely before every board meetingnot Lago
- A company that needs to show a range of outcomes rather than a single forecast, with uncertainty modelled directly in the driversnot Lago
- A budget owner outside finance who should adjust hiring or spend assumptions and see the effect without being given edit access to the master spreadsheetnot Lago
- A group already running Lucanet for consolidation and reporting that wants planning on the same platform rather than a separate toolnot Lago
Lago
- Building usage-based billing for high-volume APIs and infrastructurenot Causal
- Implementing metered billing for AI and tokenized servicesnot Causal
- Creating subscription and hybrid pricing modelsnot Causal
- Managing multi-currency billing for global companiesnot Causal
- Maintaining billing infrastructure without vendor lock-innot Causal
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Causal
- Causal was acquired by Lucanet on 31 October 2024 and the independent brand has been retired in favour of Lucanet xP&A, so the roadmap, support and pricing you buy are Lucanet’s and not the ones the product built its reputation on.
- Self-serve pricing is gone: the old causal.app pricing page now redirects to a Lucanet solution page, so what was a transparent product you could sign up for is an enterprise sales conversation with no published rate.
- The variable-based model is a genuine departure from spreadsheet thinking, so an accountant fluent in Excel must relearn how to express a model, and the team members who could previously all edit the forecast often cannot at first.
- Deep Excel compatibility is limited by design; complex existing workbooks with macros, circular references or heavy lookups do not import cleanly and have to be rebuilt, which turns a tool evaluation into a modelling project.
- Consolidation, statutory reporting and multi-entity currency handling are weaker than in dedicated corporate performance management suites, so a group with several legal entities usually needs Lucanet’s other modules alongside it, raising the real cost well past the planning tool alone.
Lago
- Free tier limited to 10,000 entities per month with 5M event cap
- No specific pricing published for Pro annual plan or Scale plan
- Self-hosted and on-premise deployments require engineering resources
- Community support only on free tier
- Scale plan requires annual contracts and sales engagement
Pricing, plan by plan
Causal
On request- Lucanet xP&A (formerly Causal)$undefined/year
- Variable-based planning models with dimensions and scenarios
- Actuals integration from accounting, CRM and warehouse sources
- Interactive dashboards for non-finance stakeholders
Lago
Free- Build (Free)Free
- 10,000 managed entities per month
- 5M usage events per month
- 1K events per second rate limit
- Pro$399/month
- 10,000 entities included (graduated pricing to 100K)
- 25M usage events included (to 500M with graduated rates)
- 10K events per second (upgradeable to 100K)
- Scale$null/custom
- Custom entity and event volumes
- 50K events per second (upgradeable to 100K)
- RBAC and SSO (SAML)
Which should you pick?
Choose Causal if
- You need variable-based modelling.
- You also want dimensional breakdowns.
Choose Lago if
- You need real-time usage metering.
- You want to start without paying.
- You work on Web, Cloud, Self-hosted, On-premise, VPC.
- You also want multiple pricing models.
Questions people ask
- Is Causal or Lago better?
- Neither clearly leads. Causal starts at On request and Lago at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Causal or Lago?
- Lago has a free tier; the other does not. Paid plans start at On request for Causal and Free for Lago.
- Does Causal or Lago run on more platforms?
- Causal runs on Web. Lago runs on Web, Cloud, Self-hosted, On-premise, VPC.
- Can I use Lago for free?
- Yes. Lago has a free tier, so you can try it without paying. Causal starts at On request.
- What is Causal best used for?
- Causal is most often used for a finance team whose three-statement excel model has become too fragile to change safely before every board meeting, a company that needs to show a range of outcomes rather than a single forecast, with uncertainty modelled directly in the drivers, a budget owner outside finance who should adjust hiring or spend assumptions and see the effect without being given edit access to the master spreadsheet, a group already running lucanet for consolidation and reporting that wants planning on the same platform rather than a separate tool. Of those, a finance team whose three-statement excel model has become too fragile to change safely before every board meeting and a company that needs to show a range of outcomes rather than a single forecast, with uncertainty modelled directly in the drivers are not what Lago is typically brought in for.
- What can Causal do that Lago cannot?
- Causal covers Variable-based modelling, Dimensional breakdowns, Scenario and range inputs, Actuals integration. Lago covers Real-time usage metering, Multiple pricing models, Automated invoicing, Prepaid credits.
Answered from the vendors’ own pages
Causal: Does Causal still exist?
The product does, as Lucanet xP&A. The independent Causal brand and self-serve offering have been retired following the October 2024 acquisition.
Lago: Can I use Lago open-source for free?
Yes, Lago is open-source under the AGPLv3 license and can be self-hosted. The cloud-based Build plan is also free with limits of 10,000 entities and 5M events per month.
SourceCausal: What does it cost now?
Nothing is published. The former pricing page redirects to Lucanet, and the product is quoted as part of the Lucanet CFO Solution Platform.
Lago: What payment providers does Lago integrate with?
Lago integrates with Stripe and Adyen for payment processing. It is not a payment processor itself but orchestrates payments through these providers.
SourceCausal: Can I import my existing Excel model?
Simple workbooks import. Models with macros, circular references or heavy lookup chains have to be rebuilt around named variables, which is the real migration cost.
Lago: Does Lago support multiple currencies?
Yes, Lago supports multi-currency billing with automatic currency conversion for global businesses.
SourceCausal: Is it a replacement for a consolidation tool?
No. It plans and forecasts. Statutory consolidation and multi-entity reporting sit in Lucanet’s other modules.
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