Houston by Praxis Lab
Know what changed in the spreadsheets your business depends on.
Houston tracks successive versions of important working files, shows you what changed and directs your attention to what needs checking—without replacing the spreadsheet.
Houston product demonstration
See how Houston identifies a changed delivery date between two file versions.
Transcript will be provided with the final video.The spreadsheet may be working perfectly well.
The difficulty begins when a new version arrives. A delivery date moves, a quantity changes, a line disappears or a project status is revised. The change may matter, but somebody first has to notice it.
Keep the file. Add control.
- 01
Bring the file you already use
Start with the spreadsheet already used by your team. Houston does not require an immediate migration into a new operational system.
Upload existing fileShort demonstration coming shortly - 02
Upload the next version
Houston matches the records and identifies additions, removals and changed values.
Track latest versionShort demonstration coming shortly - 03
Review what needs attention
Filter the version review, inspect the evidence and decide what action should follow.
Review material changesShort demonstration coming shortly
A changed cell is only the beginning.
Houston identifies that the supplier date moved by eleven days. The operational question is whether that change affects production, delivery or a customer commitment.
- Item
- Cove frame assembly
- Production required
- 22 August
- Customer commitment
- 5 September
Supplier delivery schedule demonstration
See Houston identify an eleven-day change to a supplier delivery commitment.
Transcript will be provided with the final video.What needs review
Verdi Contract Furniture Ltd.’s latest file moves purchase order VPO-10482 from 18 to 29 August. That is seven days after the production requirement date. Houston keeps the source versions and the changed value together so a person can decide what follows.
Different files. The same control problem.
Houston makes change—and uncertainty—visible.
Houston does not quietly guess when two records cannot be matched. It shows the uncertainty so that a person can review it.
- Rows added
- Rows removed
- Values changed
- Columns added or removed
- Records not matched confidently
- Changes since the previous version
- Evidence from the source versions
- Original files and tracking history
Focused by design.
Houston is
- A control layer around important spreadsheets
- A way to track successive file versions
- A way to expose changes and discrepancies
- A directed review surface for human decisions
- A focused tool configured around a recurring source
Houston is not
- A replacement for every spreadsheet
- An ERP or planning-system replacement
- A complete workflow platform
- An automatic decision-maker
- A promise that every file needs no configuration
Start with one real file.
Send two representative versions of a recurring spreadsheet. Praxis Lab will help configure the first version review, examine the results with you and determine whether Houston would be useful as an ongoing control.
- Share two representative file versions.
- Identify what each row represents.
- Confirm the fields that matter.
- Run the first version review.
- Review the findings together.
- Continue only when the result is useful.
One recurring source. A clear starting point.
- Track successive versions of one agreed recurring source
- Founder-supported initial setup
- Relevant worksheets, expected frequency and users agreed during setup
- No ongoing commitment; cancel at any time
- You retain ownership of your files and data
Your files remain your files.
Houston is a control around working files, not a claim over them.
Read how Houston handles data- Customers retain ownership of their files.
- Original files are not silently edited.
- Praxis only inspects files when access has been agreed.
- Optional product-learning access must be explicit.
- Private use remains available.
- Customers can request deletion of their data.
Questions, answered carefully.
Do I need to change my spreadsheet?
Not necessarily. Houston starts with the file your team already uses. Some configuration may be needed so that records and important fields can be identified reliably.
Which spreadsheet formats are supported?
The first version-tracking setup is agreed with Praxis Lab after reviewing representative files. Standard Excel and CSV files are the intended starting point; confirm your particular format during setup.
Does Houston alter the original file?
No. Houston keeps the source evidence visible and does not silently edit either original file.
What happens when column names change?
Houston can be configured around expected fields. A changed or missing column is made visible for review rather than quietly ignored.
What happens when Houston cannot identify the same row?
It shows that the match is uncertain. A person can then inspect the evidence and decide whether the records belong together.
What does the £100 subscription cover?
The starting subscription tracks successive versions of one agreed recurring source, configured around its current structure. During setup, Praxis agrees the relevant worksheets, expected version frequency and intended users with you. A materially different layout or another recurring source is assessed separately before any change to scope or price.
Can Houston reconcile two different sources?
Potentially. Reconciliation is distinct from tracking successive versions of one source and needs its own agreed configuration. Praxis will confirm whether the proposed sources can be matched meaningfully.
Does Houston automatically decide whether a change is a problem?
No. Houston directs attention to evidence. The operational decision remains with the people who understand the context.
Can Praxis help configure my file?
Yes. Founder-supported setup is included in the initial offer.
Is my data private?
Private use remains available. Praxis only inspects customer files when access has been agreed, and optional product-learning access must be explicit.
Can I delete my files?
Yes. Customers can request deletion of their files and associated data.
Can I cancel at any time?
Yes. The launch offer has no ongoing commitment.
Can several people from one company use Houston?
Discuss the team and recurring file during setup so that the right access arrangement can be agreed.
Try Houston with one of your files.
Tell Praxis about the recurring file and the change you need to see. Do not attach confidential files here; a secure way to review representative versions can be agreed afterwards.
Houston by Praxis Lab
Bring the spreadsheet you already depend on.
Start with two versions of one recurring file and see whether Houston finds something worth your attention.