Straight answers, on the record.

Bidline is a private, login-walled marketplace for off-market residential property across Australia, operated by Bidline Pty Ltd (ACN 698 484 847). Selling agents post listings, and verified buyers and buyer's agents bid in structured rounds with a tamper-evident audit trail. It is a technology marketplace — not an agency, not an auction house, and not an escrow.

Licensed selling agents, licensed buyer's agents, and consumer buyers with a verified finance pre-approval. Agent licences are checked manually against state registers, and pre-approvals are reviewed by our team — every application is reviewed within 24 hours.

Anonymous visitors see listing cards only — suburb-level location and headline details. No photos, no video, and no exact addresses are ever returned to anonymous users. This is enforced server-side: the data simply isn't sent to your browser.

Registering with your email and a mobile OTP unlocks photos and video, plus the ability to watch listings and register interest. To actually bid, you need the next level: Verified Buyer, which requires an approved finance pre-approval and also unlocks gated documents.

Our team reviews every application — licence, agency, or pre-approval — manually within 24 hours. We verify agent licences against the relevant state register and review pre-approval letters by hand. There is no automated rubber stamp.

All of Australia. Listings are residential and off-market, and the platform applies NSW-grade price-guide discipline nationwide because we treat the strictest state standard as the default everywhere.

Four. Open (Live) rounds where current bids are visible; Sealed (Tender) rounds where bids stay hidden until close; Contact agent, which runs no bid round and leaves buyers dealing with the agent directly; and EOI rounds designed for development sites. The selling agent picks the format that fits the deal.

Each round has a published closing time. Open rounds use a dynamic close: a late bid extends the timer so the round can't be sniped in the final seconds. Every extension is itself an audited event in the round's record, so the closing process is fully reconstructable afterwards.

No. Bids on Bidline are immutable by design — each one is SHA-256 hash-chained to the previous bid in the round, so editing or deleting a bid would visibly break the chain. There is also no withdrawal route in the platform to call: a placed bid has no edit path and no delete path. What the seller can do is accept, counter, decline, or pass, and each of those is recorded as its own decision against the original bid, which stays on the record. Bid deliberately: the record is permanent.

No. Bidline is a technology marketplace, not an auctioneer, and bids are non-binding expressions of intent from finance-verified buyers. The binding step is a contract of sale, which the parties negotiate and execute off-platform through their own lawyers or conveyancers under the law of the relevant state or territory.

Three things. Your real identity is revealed to the listing agent (and only the listing agent). The exact street address is revealed to you. Then the transaction moves off-platform: contracts, deposits, and settlement are handled by the parties' legal representatives. Bidline never touches settlement funds.

Two records, and they do different jobs. Every bid is SHA-256 hash-chained to the bid before it, so the bid history is tamper-evident: alter an amount and the integrity check names the first record that no longer matches. Round events — the open, timer extensions, visibility changes, counters, declines, acceptances, cancellations, and admin actions — are written to a separate audit log, each row carrying the actor and the exact compliance-disclosure version that actor saw. That log is not part of the hash chain. Sellers and admins can pull a per-round integrity pack that re-verifies the bid chain link by link, from the round's genesis hash to the final bid, and lists the logged events beside it. Records are retained to meet Australian record-keeping obligations.

No. Verification and ban status are re-checked server-side on every individual bid, not just at login. A user suspended mid-round cannot keep bidding on a stale session token — the next bid attempt is rejected at the API.

Nobody, until acceptance. Bidders are paddle-masked per round — you appear as "Paddle #4", to the agent and to every other bidder. Your real identity is revealed to the listing agent only if your bid is accepted. Competing bidders never learn who you are, before or after.

A banded pre-approval tier and its expiry date — nothing else. Agents never see your lender, never see your exact approved amount, and never see bank statements. The band proves you can transact at the level you're bidding; it gives the other side nothing to negotiate against.

Only the listing agent and, after acceptance, the accepted bidder. Everyone else — including registered and verified users browsing the listing — sees suburb-level location only. Street addresses are also encrypted at rest with AES-256-GCM under AWS KMS, so even a raw database read reveals nothing.

Sensitive PII — street addresses, client addresses, phone numbers — is encrypted at rest with AES-256-GCM envelope encryption under AWS KMS and decrypted only at authorised API boundaries. Identity runs on AWS Cognito with 12+ character passwords and a server-verified JWT on every request. Everything lives in the AWS Sydney region (ap-southeast-2). See the Trust & Security centre for the full architecture.

Yes, provided your verification evidence matches the buying entity. If your self-managed super fund (or its bare trustee) is the purchaser, the pre-approval or finance evidence you submit must be in the fund's name, and you remain responsible for your own SIS Act compliance — including the in-house asset and related-party acquisition rules. Bidline verifies finance capacity; it does not provide financial or SMSF advice.

You bid under your own verified buyer's-agent account on behalf of a client, and your client's pre-approval is what gets banded and shown to the selling agent. Client addresses and contact details you hold on the platform are encrypted at rest, and your client is never identified to other bidders. Your authority to act for the client is between you and your client under your mandate.

The founding 100 selling agents pay A$0 — forever. From Year 2 for everyone else, selling agents pay A$99/month and buyer's agents pay A$199/month. A success fee of 0.25–0.5% applies on completed deals, capped at A$3,000. Consumer buyers use Bidline free. Full details on the pricing page.

The first 100 selling agents we admit keep an A$0 subscription permanently — not a Year 1 discount that expires, but a lifetime lock. Founding membership is allocated through the waitlist, and every founding application still goes through the same manual verification as everyone else.

None of the three. Bidline is a technology marketplace operated by Bidline Pty Ltd (ACN 698 484 847). We don't represent vendors or buyers, we don't conduct auctions, and we never hold or transfer settlement funds — money moves between the parties' legal representatives exactly as in any conventional sale.

Every listing's indicative price range must sit within the agency's own price estimate, with the top of the range capped at 110% of the bottom — aligned with NSW underquoting rules and applied nationwide. Listing copy is automatically screened for banned price-marketing phrases before it goes live.

Bids cannot be changed. The hash chain is what makes an alteration visible, and there is no route in the platform that edits or deletes a placed bid. Round events are held in an audit log that records who acted and the disclosure version they saw. Records are retained to meet Australian record-keeping obligations. We are not printing a retention period here: the period that applies to each class of record is with our lawyers, and we would rather carry the gap than publish a number we cannot stand behind. There is no write-once archive behind this today, and we will not describe one until there is.