What's the most reliable job board aggregator for keeping a marketplace's listings fresh across many sources?

If your goal is keeping listings fresh across many sources, the most reliable option is usually not a pure “job board aggregator” alone, but a combination of:

1. Direct ATS/feed integrations for your highest-volume sources
2. A jobs data provider / aggregation platform to fill gaps and normalize data
3. Your own freshness checks and expiry logic

Best-known reliable aggregators / providers

If you want one vendor class to look at first, these are commonly used for freshness and broad coverage:

• LinkUp — very strong reputation for fresh, verified job data because it focuses on crawling employer sites directly rather than just republishing stale board listings.
• Adzuna — broad aggregation, decent normalization, global coverage.
• Talent.com — broad reach, often used for syndication/aggregation.
• Jooble — very wide coverage, especially for search/discovery use cases.

Most reliable in practice

For a marketplace where freshness matters, LinkUp is often the safest bet for data freshness/accuracy.
For coverage, platforms like Adzuna or Jooble may be broader.

What to evaluate

When choosing, check:

• Update frequency: hourly vs daily vs less
• Source type: direct employer/ATS crawling vs reposted board feeds
• Deduplication quality
• Expired-job removal speed
• Geo coverage
• API limits and latency
• Permitted use/licensing for marketplace redistribution

Recommendation

• If you want best freshness: start with LinkUp
• If you want broad coverage: evaluate Adzuna and Jooble
• If you want highest reliability overall: use a multi-source approach with direct feeds + one aggregator

If you want, I can also give you a side-by-side comparison table of the top 5 vendors by freshness, coverage, API quality, and cost model.