Why 'reliable' is the hard part
Most subcontractors do not have a lead volume problem. They have a lead quality problem. Free tender aggregators, LinkedIn posts, news articles, and word-of-mouth all generate leads, but a huge share of them are stale, incomplete, or already awarded by the time you see them.
Unreliable lead data usually shows up as one of these: a project that never actually goes to tender, a bid date that keeps slipping with no notice, a GC contact who left the company months ago, missing addenda that quietly disqualify your bid, or a plans link that is expired. Every one of these costs estimating hours you cannot get back.
The three types of lead sources in Ontario
Every source an Ontario sub uses falls into one of three buckets. Understanding what each bucket does well, and what it misses, is the foundation of a working lead strategy.
- Free public tender portals: Merx, Biddingo, Bids&Tenders, individual municipal sites. Only show projects from agencies that pay to post there.
- Paid project intelligence platforms: DataBid, ConstructConnect, Dodge. Attempt to locate projects from all sources, public and private, often earlier in planning or design.
- Private GC bid lists: invitations directly from general contractors. Highest conversion, but requires relationships and knowing who is bidding what.
Free public portals: what they actually cover
Free portals are useful, but every one of them is a subset of the market. Each portal only lists projects from the owners and agencies that subscribe to that specific platform.
Merx covers federal government work and a portion of the broader Canadian public sector. Biddingo hosts many Ontario municipalities, school boards, and public agencies that pay for its plan room. Bids&Tenders is a portal used by individual cities and agencies that subscribe. If your target city posts on Bids&Tenders you have to be there. If your next target posts on Biddingo you have to subscribe there too.
The practical result: no single free portal is comprehensive. Subs who rely only on free sources end up either bouncing between five or six accounts every morning or missing large parts of their market entirely.
Paid intelligence platforms: what they add
Services like DataBid, ConstructConnect, and Dodge are different from plan rooms. Instead of hosting one agency's tenders, they attempt to locate all projects from all sources, aggregate them into one system, and flag them by stage.
The two things a good intelligence platform adds on top of free portals: coverage of private work that never touches a public portal, and earlier visibility. Some projects are entered months before bidding, while they are still in planning or design. Others are entered days or weeks before the due date, depending on when the source first publishes them. Not every project shows up early, but enough do to change how you plan your week.
How to vet a lead before spending time on it
Before your estimator touches a set of drawings, the lead should clear a short checklist. If any of these are missing, the lead moves down the priority list or gets set aside entirely.
- Verified owner or agency (not just a project name)
- Named GC and estimator contact, with current phone and email
- Confirmed current stage (design, tender, awarded)
- Actual bid date, not 'TBD' or a date that has already been extended twice
- Plans and specs available and downloadable now
- Addenda log visible so you can confirm you have the latest version
- Plan holder list visible so you know who else is quoting
Getting on GC bid lists (the highest-conversion source)
The subs who consistently win the most work are not usually the ones with the most leads. They are the ones on the right invited bid lists.
Lead data feeds this in a way most subs miss: when you can see a project at the planning or design stage, you have weeks or months to call the GC before invitations go out. That single phone call is the difference between being one of twelve public quotes on bid day and being one of three invited subs the GC actually wants to hear from. See our companion guide, How Construction Bidding Works in Ontario, for how invited bids fit into Contract A.
Red flags in lead data
Not all data is worth chasing. Common signals that a lead source (or a specific project) is going to waste your time:
- No owner, no GC, and no contact listed
- Bid date shown as 'TBD' for weeks without movement
- No plans available and no path to request them
- Project stage that never changes over several months
- Duplicate entries for the same project with conflicting details
- No addenda tracking, so you cannot tell if documents are current
What good lead data looks like for Ontario subs
The goal is not more leads. The goal is fewer, better leads with enough context to make a decision in under two minutes. Good lead data for an Ontario sub includes verified owner and GC, a named estimator, current stage with real dates, the plan holder list, an addenda log, and historical bidding patterns for the GCs involved so you know whether they typically award to low bid, to a shortlist, or to a preferred sub.
What to look for when evaluating a lead source
Not every subscription is worth the money, and not every free portal is worth the login time. Before you commit to a new source, walk it through this checklist:
- Pre-construction coverage: does it show projects in planning and design, or only after they hit public tender?
- Ontario geographic depth: does it cover the municipalities, agencies, and private owners you actually pursue?
- Commercial focus: is it built for commercial construction, or padded with residential and small-reno work you do not bid?
- Plan holder and bidder list visibility: can you see who else is quoting before bid day?
- Bid results: are past bid results published, and how quickly after opening?
- Company and contact data: does it include current owner, GC, architect, and estimator contact info?
- Saved search alerts: can you get daily notifications when new projects match your filters?
- Trial or preview: can you test the actual data for your trades and region before you subscribe?
Bid results: the feedback loop most subs skip
Finding projects is only half the job. Knowing what happened after bid day is what makes you sharper on the next one. Bid results tell you who won, what they bid, and how close your number was, which lets you calibrate pricing, spot GC award patterns (low bid vs shortlist vs preferred sub), and identify potential teaming partners.
Bid results come from three places: public agencies that publish bid tabulations after opening, GCs who share results with invited subs, and paid intelligence platforms that aggregate and republish results across many projects. Public tabulations can take days to weeks to appear, private results depend on the GC. DataBid publishes bid results as they become available from the awarding agency, so subs can benchmark before their next similar bid instead of months later.
Where DataBid fits
DataBid is built specifically for Ontario commercial construction. It aggregates from hundreds of sources so subs do not have to log into a stack of separate portals. Every project is verified and staged, plan holders and bid results are tracked, and Smart Matching surfaces the projects that fit your trade and geography first. Saved searches send daily email alerts so new matching projects come straight to your inbox. Ten plus years of historical Ontario project data helps you research the GCs you are quoting to before you send a number.
Compare DataBid with ConstructConnect, or start a 5-day free trial and see live Ontario projects in your inbox in minutes.