8 Best IT Staffing Agencies in Seattle, WA (2026)
Quick Picks
- Best overall: Apex Systems (Everforth Apex)
- Best verified award record: Apex Systems or Addison Group
- Best for pure software engineering specialization: Rooster Park
- Best for IT plus finance under one vendor: Robert Half Technology
- Best for national enterprise coordination: Insight Global or TEKsystems
Juan Alba is an IT Research Analyst at itreviews.co.
A data caveat matters more in this market than most. Two firms with genuinely strong national reputations, Motion Recruitment and Addison Group, returned Google Business listings for other cities entirely rather than a Seattle address during this research. That’s very likely a data resolution issue rather than a sign either firm lacks a real Seattle presence, and both entries below are flagged accordingly rather than scored as if the gap reflects quality. Meanwhile, KORE1 continues the pattern seen in every other market this site has covered, no confirmable current Seattle address turned up anywhere. See how the Trust Score works before reading the rankings below.
How We Compared These Agencies
Trust Score Factors — Seattle IT Staffing
No agency paid for placement. Every provider is scored on the same six factors, with weights published on the itreviews.co methodology page.
IT Staffing Agencies in Seattle, Compared
| Agency | Trust Score | Seattle-Area Presence | Years in Market | Google Rating | Best For |
|---|---|---|---|---|---|
| Apex Systems (Everforth Apex) | 6.3/10 | Confirmed office (Bellevue) | 31 years | 3.2 (11) | Strongest verified award record |
| Robert Half Technology | 6.0/10 | Confirmed office | 78 years | 2.2 (44) | IT plus finance under one vendor |
| Rooster Park | 5.6/10 | Genuine Seattle HQ | 18 years, acquired by Eliassen Group in 2021 | 5.0 (2, thin) | Deepest software engineering specialization |
| Insight Global | 5.5/10 | Confirmed office | 25 years | 4.0 (87) | National multi-market coordination |
| TEKsystems | 5.0/10 | Confirmed office | 43 years | 2.2 (10) | Longest institutional history |
| Addison Group | 4.8/10 | 27 years | Unconfirmed this session | Strongest national award trail, once local data is confirmed | |
| KORE1 | 3.9/10 | Unconfirmed this session | 21 years | No listing found | Broad engagement models, if local presence is confirmed |
| Motion Recruitment | 3.5/10 | 37 years | Unconfirmed this session | Deep tech specialization, once local data is confirmed |
The 8 Best IT Staffing Agencies in Seattle
Score Breakdown
Apex Systems, operating as Everforth Apex, carries the same 15-Year Diamond client and 10-Year Platinum talent ClearlyRated streak seen in every market this site has covered, a genuinely strong, independently verified, multi-year credential. The Bellevue office puts Apex physically inside the Seattle metro’s Eastside tech corridor, close to Microsoft and Amazon’s satellite campuses.
11 Google reviews at a 3.2 average is a thin, middling local signal relative to that award history. Founded in 1995, Apex covers full-spectrum IT staffing at national scale, useful for Seattle-area enterprise and government-adjacent clients that need infrastructure a boutique can’t match.
Best for a buyer who weighs a long, independently verified award record heavily and can look past a thin local review sample.
Score Breakdown
- 44 Google reviews at the Seattle office, averaging 2.2, one of the weaker local scores on this list
- Clutch shows 4.8 from 2 reviews, though that’s the firm’s general company profile, not specific to Seattle or technology
- IT remains secondary here, running alongside the firm’s core finance and accounting specialty rather than as the primary focus
Best for established companies that want IT hiring bundled with finance staffing under one long-tenured, widely known vendor.
Score Breakdown
Founded in Seattle in 2008 by Scott Ruthfield, Rooster Park built its entire practice around one thing, software engineering staffing across the full lifecycle: developers, QA engineers, program managers, systems analysts, UX designers. In 2021, Eliassen Group, a national strategic consulting and talent solutions firm founded in 1989, acquired Rooster Park, extending it national reach while keeping the Seattle team and brand in place.
The Google signal here is genuinely thin, a 5.0 average across only 2 reviews, not enough volume to lean on with confidence either way. What’s real is the specialization itself: no other firm on this list runs a practice this narrowly built around one technical discipline.
Best for a Seattle company hiring specifically for software engineering roles that wants deep discipline-specific recruiting, not a generalist.
Score Breakdown
Nothing award-related specific to this research turned up, and no Clutch profile with reviews attached. Insight Global’s real pitch is coordination at scale across multiple markets, which matters more for a company running requisitions across several cities than for one specialized Seattle hire.
Best for enterprise buyers who need a large national bench and multi-city coordination over a boutique-level local relationship.
Score Breakdown
10 Google reviews at a 2.2 average is both thin and weak, a real, flagged finding rather than a rounding error. That’s worth confirming directly with the firm rather than assuming the national brand’s reputation carries cleanly to this specific office.
Best for large enterprises weighing institutional scale and program infrastructure above what a currently thin local review base is saying.
Score Breakdown
Addison Group carries one of the strongest verified award records this site has found anywhere, Staffing Industry Analysts’ top U.S. staffing firm recognition for nine consecutive years, Inc. 5000, and a 2022 Forbes Top 200 Best Professional Recruiting Firms placement.
ClearlyRated’s own published Seattle IT staffing list does show Addison Group as a genuine local participant, which suggests a real Seattle presence exists even though this session’s Google data didn’t confirm it directly.
Best for a Seattle company that wants blended IT, finance, and HR staffing backed by a strong national award record, once local presence is confirmed directly.
Score Breakdown
This is the fifth market covered on itreviews.co where no current physical KORE1 office could be confirmed through Google Maps or a direct search. KORE1 publishes a page ranking itself the top staffing agency in Seattle, citing a 4.7 Glassdoor score and a 17-day average fill time, neither of which was independently verified in this research, and neither of which appears on ClearlyRated’s own published Seattle winner list.
Founded in 2005 and headquartered in Irvine, California, KORE1 does carry genuine strengths elsewhere, six confirmed Inc. 5000 appearances between 2013 and 2020, and the broadest documented service breadth of any firm on this list. Those strengths haven’t offset an unconfirmable local footprint in any of the five markets checked so far.
Best for companies that want KORE1’s broad engagement models, once a current Seattle presence is verified directly with the firm.
Score Breakdown
Motion Recruitment has run pure tech staffing since 1989, and the firm’s national review record, seen clearly in the New York and Los Angeles pieces this site has published, is among the strongest of any agency covered anywhere. None of that shows up here. This session’s Google Maps search for Motion Recruitment in Seattle resolved to the firm’s New York listing instead of a Seattle address, so no local review data could be confirmed for this specific market.
Motion’s tech-only focus, contract, direct hire, managed solutions, and SOW engagements, plus its 2024 acquisition by Kelly Services, are exactly the profile that should perform well in a market as tech-dense as Seattle.
Best for companies hiring senior software engineers or DevOps leads who should confirm Motion’s actual Seattle office and reviews directly rather than relying on this entry’s rank alone.
What IT Staffing Actually Costs in Seattle
None of the 8 agencies above publish Seattle-specific rates, so treat the figures here as a market benchmark, not a quote from any firm on this list. Direct hire placements typically run 15% to 30% of a candidate’s first-year salary, with 20% the single most common rate per Staffing Industry Analysts’ benchmark research. Contract roles bill hourly with a markup over the worker’s actual pay, usually landing between 25% and 75% depending on skill scarcity. Seattle’s concentration of Amazon, Microsoft, and a growing AI and cloud startup base keeps competition for strong engineering candidates intense, which pushes agencies with genuine local relationships toward the higher end of that range.
Get a specific quote before assuming these ranges apply to your search.
How to Choose an IT Staffing Agency in Seattle
Match the agency to the shape of the hire. A single specialized software engineering role fits Rooster Park’s deep discipline focus. A multi-department buildout across IT, finance, and HR fits a generalist like Addison Group or Robert Half. An enterprise program running across multiple cities fits TEKsystems or Insight Global’s coordination infrastructure.
- Need the strongest verified award record? Apex Systems or Addison Group.
- Need pure software engineering specialization? Rooster Park.
- Need IT bundled with finance staffing? Robert Half Technology.
- Before ruling out any firm on this list based on rank alone, check whether the gap is a real quality signal or a data availability issue the way it was for two agencies here.
Check any provider’s full Trust Score breakdown against what matters most for your specific search.
Questions Seattle Buyers Ask Before Signing With a Staffing Agency
Where This Leaves You
Apex Systems takes the top spot on the strength of the deepest verified award record on this list and a confirmed local office. Robert Half Technology is the strongest alternative for buyers who want IT staffing bundled with finance hiring. Two entries on this page, Motion Recruitment and Addison Group, deserve a second look beyond their rank here specifically because the data gap behind their scores is a research limitation, not a demonstrated weakness. Every score on this page comes from itreviews.co’s fixed Trust Score methodology, applied the same way to every agency covered. Read the full methodology to see exactly how these numbers were built.
Juan Alba, IT Research Analyst, itreviews.co. Scores follow the site’s published Trust Score methodology.