Zephior vs ContraVault AI
Carry technical tender analysis into the finished package.
Choose Ziva when the task is flexible supplier response production across original files and supporting material. She can revise narratives, construct workbooks and prepare diagrams or presentations. ContraVault’s specialized takeoff, estimation and vendor-sourcing functions remain separate requirements to assess directly.
Where Ziva makes the difference
Get more of the work off your team’s desk.
Delegate the work between analysis and submission files
Ziva can complete the original questionnaire, revise the methodology and build supporting annexes or slides. She can change tables, layout and commercial formulas. The bidder gets an editable response package instead of a separate analysis that someone must translate into documents.
Keep technical attachments in the review context
Use existing drawings and diagrams alongside the narrative; supported technical previews help reviewers inspect relevant attachments. Ziva can also extract reusable evidence from visual company material. This supports response preparation without claiming that document work replaces measured takeoff or professional engineering judgment.
Reuse the company’s delivery method safely
Retain terminology, document standards and repeatable preparation instructions across bids. Source-specific access limits sensitive material to the right contributors, while accepted document history supports correction. Compare the actual production and specialist-estimation scopes separately.
Where each fits
Start with the job you need done.
Consider ContraVault AI for
AEC and infrastructure teams linking complex tender review with estimation, vendor comparisons and bid preparation.
Choose Zephior for
Suppliers seeking company-specific monitoring and flexible response or managed preparation across their procurement pursuits.
The construction workflow is broader than writing
Current materials connect bid intelligence with drawing takeoff, estimation and vendor sourcing. Test those specialist tasks directly.
ContraVault current bid, estimation and sourcing proposition(opens in a new tab)Risk and contradictions are central
The platform describes requirements, contractual risk, pre-bid clarifications and go/no-go support across tender documents.
ContraVault current bid, estimation and sourcing proposition(opens in a new tab)Forms and packages receive attention
Its bid-submission product describes form filling, proposal drafting and organizing documents for the response.
ContraVault bid-submission features(opens in a new tab)Across the bid lifecycle
Follow the work, stage by stage.
Compare the published scope with the work your team needs. A capability to verify is an evaluation question, rather than proof a product cannot do it.
Discover
Find the next opportunityContraVault publishes live Indian tender search and promotes opportunity shortlisting. Confirm source coverage and monitoring for your market.
ContraVault India discovery and bid workflow(opens in a new tab)Search supported public procurement markets with Discover and receive company-specific monitoring through Intelligence.
Qualify
Decide where to investGo/no-go, risk and contradiction analysis support technical and commercial assessment.
ContraVault current bid, estimation and sourcing proposition(opens in a new tab)Assess relevance, requirements and evidence gaps. A preliminary Intelligence recommendation is distinct from a complete tender-document audit.
Pursue
Shape the bid strategyEstimation and vendor sourcing can support a priced construction bid. Scope these separately from narrative preparation.
ContraVault current bid, estimation and sourcing proposition(opens in a new tab)Bring in Zelius for pursuit sparring, bid strategy, specialist coordination and a scoped delivery plan.
Remember
Reuse company evidenceProposal reuse and company material support drafting; inspect the evidence selected for the current job.
ContraVault packages and options(opens in a new tab)Turn existing documents and diagrams into reusable company evidence. Select the sources for each bid, review proposed knowledge changes and carry company terminology and working instructions into later assignments.
Respond
Produce the actual filesThe published suite includes drafting, form extraction and autofill, translation and bid attachments. Confirm tier inclusion.
ContraVault packages and options(opens in a new tab)ContraVault bid-submission features(opens in a new tab)Give Ziva the buyer’s original files and the outcome. She can fill workbook cells, revise document content and layout, build calculations and prepare related Word, Excel, PDF and presentation deliverables.
Review and deliver
Move to approved outputShared workspaces, tasks and review support package preparation. Demonstrate who performs the actual portal actions and obtains the receipt.
ContraVault packages and options(opens in a new tab)ContraVault bid-submission features(opens in a new tab)Keep source-scoped reviewers, comments and accepted document history beside production. Review and restore prior accepted versions. Zelius can handle separately agreed submission work with customer approval and authority.
Zephior combines separately purchasable software and managed services. Customer decisions, declarations, pricing and final approval remain with the customer. Product access and service scope follow the chosen plan and agreement.
Pricing and ownership
Price the work completed, not just the subscription.
ContraVault AI
ContraVault’s pricing page lists Starter, Professional and Enterprise with a feature comparison but no verified numeric subscription amount. It identifies some integrations, API and enterprise controls as add-ons or options. Request exact users, modules, estimation scope, source coverage and implementation terms; a feature name in a matrix does not prove every tier includes it.
ContraVault packages and options(opens in a new tab)Zephior
Projects starts at CHF 500 per month for one Project Key, with unlimited users and company knowledge within one organization. Independent Intelligence starts at CHF 199 per month for one country. New software access starts paid with the published first-month money-back conditions. Zelius services have their own agreed scope and fees.
See current Zephior pricing ↗Compare tender analysis, drawing or BOQ work, proposal production, team review and final submission as separate deliverables. Then price the software and human responsibilities needed for each.
Published prices are starting points, not like-for-like quotes. Confirm currency, taxes, billing period, scope and current terms with each provider.
Make the evaluation useful
Bring a tender your team knows.
Use a past submitted tender as a benchmark, or a suitable live package. Compare the evidence, the final output and the work left for your team.
Use a contradictory tender package
Include inconsistent specifications and contract clauses. Inspect source references, the proposed risk and the clarification question.
Test a real drawing and BOQ
If estimation matters, compare measured quantities and traceability against your estimator’s reference work.
Fill a buyer form without losing constraints
Include validations, declarations and required attachments. Inspect the final original-format file and approval state.
Define the delivery boundary
Assign discovery, pricing inputs, narrative, specialist approvals, signatures and portal receipt. Require written scope for each provider’s work.
Questions before you choose
A closer look.
Does ContraVault only analyze documents?
No. Its current pages also describe response preparation, estimation and vendor sourcing. Evaluate the relevant modules and actual current availability.
ContraVault current bid, estimation and sourcing proposition(opens in a new tab)ContraVault bid-submission features(opens in a new tab)Does a bid-submission product mean a vendor will submit for us?
Confirm the actual operating scope. Form filling and package assembly are distinct from an authorized person completing portal actions and confirming receipt.
Sources and comparison method
Reviewed 19 October 2026. Competitor descriptions use the official product and pricing sources below. These are published capabilities, not results from a controlled product trial. Zephior publishes this comparison and has a commercial interest in your choice. Workflow recommendations are our assessment.
- ContraVault current bid, estimation and sourcing proposition ↗(opens in a new tab)
- ContraVault packages and options ↗(opens in a new tab)
- ContraVault bid-submission features ↗(opens in a new tab)
- ContraVault India discovery and bid workflow ↗(opens in a new tab)
For Zephior’s current offer, see Ziva, Zelius and pricing. Ask us to demonstrate any requirement that is essential to your decision.
Your next opportunity
Bring the work.
See how far Zephior takes it.
Discuss your markets, a representative tender and the parts your team wants to hand over.