How we make this list: we compare pricing pages, product documentation and public user reviews. Ratings come from G2, Capterra or Trustpilot, with the date we checked them.
Key takeaways
- TriNet and Insperity suit mid-size and larger companies that want a full PEO with industry-specific compliance and group benefits.
- ADP TotalSource and Paychex suit companies of many sizes that want payroll, tax filing, and HR support from a large, established provider.
- Justworks suits startups that want bundled PEO support with a flat per-employee monthly fee.
- Bambee suits small businesses that need a dedicated HR manager and custom policies at a low monthly cost.
- G&A Partners and Insignia Resources suit companies that want a flexible outsourcing partner rather than a one-size PEO.
Quick comparison
| Tool | Best for | Starting price | Free plan |
|---|
 TriNet | Companies that want industry-specific PEO support | $125 per employee/month | No |
 Insperity | Mid-size companies that want full-service HR | See website | No |
 ADP TotalSource | Companies that want PEO scale and compliance depth | See website | No |
 Paychex | Businesses of any size that want flexible HR outsourcing | $39 per month | No |
 Justworks | Startups that want bundled PEO support | See website | No |
 Bambee | Small businesses that need a dedicated HR manager | $99 per month | No |
 G&A Partners | Companies that want HR plus outsourced accounting | See website | No |
 Insignia Resources | Mid-size companies that want a dedicated HR partner | See website | No |
Is your product missing or out of date?
We review this list regularly. Vendors can request a listing, send updated pricing or ask about featured placement.
The best outsourced hr companies for US employers
#1TriNet
Best for: Companies that want industry-specific PEO support4.2/5 on
G2 (2,038 reviews, checked Oct 2026)
Visit trinet.com
Starting price$125 per employee/month
Free planNo
TriNet is one of the largest PEO providers in the US, and its differentiator is industry focus. Instead of a generic HR team, clients get advisors familiar with their sector, whether technology, life sciences, financial services, or nonprofits. The company offers both PEO co-employment and an HR Plus model without co-employment, and its benefits packages give small teams access to group health plans they could not negotiate alone. Published pricing runs around $125 to $200 per employee per month depending on industry and services.
That per-employee cost adds up, and a very small business may find Bambee or Paychex cheaper for basic HR help. TriNet's platform includes analytics and compliance alerts, which help a growing company track risk across states. For a company in a regulated or benefits-sensitive industry, TriNet's sector depth is a real advantage.
What we like- Industry-specific HR teams for tech, finance, healthcare, and nonprofits
- PEO and non-co-employment options
- Group benefits for small teams
Watch out for- Per-employee pricing adds up for larger teams
- Enterprise process can feel heavy for very small firms
- Service quality varies by industry team
#2Insperity
Best for: Mid-size companies that want full-service HR4.3/5 on
G2 (422 reviews, checked Oct 2026)
Visit insperity.com
Starting priceSee website
Free planNo
Insperity is a full-service PEO that handles payroll, benefits administration, compliance, workers' compensation, and HR support for mid-size companies. The company is often ranked first for mid-size HR outsourcing, and its model suits a business with 50 to 500 employees that wants a single partner for the whole HR function. Dedicated service teams give clients a consistent point of contact rather than a general queue.
Pricing is custom and quote-based, so a buyer should request a full proposal with per-employee costs and service tiers. Very small businesses may find Insperity more than they need, since the model is built for companies with a real HR workload. For a growing company that wants HR handled professionally without building an internal department, Insperity is a leading choice.
What we like- Full-service PEO with payroll, benefits, and compliance
- Dedicated service teams
- Strong fit for 50 to 500 employee firms
Watch out for- Pricing is quote-based
- Better suited to mid-size than very small firms
- Co-employment model is not for every owner
#3ADP TotalSource
Best for: Companies that want PEO scale and compliance depth4.3/5 on
G2 (595 reviews, checked Oct 2026)
Visit adp.com
Starting priceSee website
Free planNo
ADP TotalSource is the PEO arm of ADP, one of the largest payroll and HR companies in the world. TotalSource combines payroll, tax filing, benefits, compliance, and risk management in a co-employment model, which suits companies in regulated industries and companies operating in many states. ADP's scale means tax and compliance handling is deeply resourced, and its platform covers time tracking, benefits, and reporting.
Scale has a downside. Service can feel impersonal compared with a smaller provider, and pricing is quote-based, so a buyer should compare the full per-employee cost against TriNet and Insperity. For a company that values the backing of a very large provider and needs multi-state compliance handled reliably, ADP TotalSource is a safe and proven pick.
What we like- Very large PEO with deep compliance and tax expertise
- Payroll and benefits at scale
- Strong fit for regulated industries
Watch out for- Pricing is quote-based
- Large-company service can feel impersonal
- Smaller clients may get less attention
#4Paychex
Best for: Businesses of any size that want flexible HR outsourcing4.1/5 on
G2 (1,748 reviews, checked Oct 2026)
Visit paychex.com
Starting price$39 per month
Free planNo
Paychex stands out for flexibility. A business can start with payroll only, add HR outsourcing, or move to a full PEO, all on the Paychex Flex platform, which handles payroll, time tracking, benefits, and HR across all 50 states. Published pricing starts around $39 per month plus per-employee fees, with custom pricing for PEO services. Support runs 24 hours a day, which helps a business with shift workers or multi-state staff.
The base price is only part of the cost, since per-employee fees and tier upgrades add up. A buyer should price the exact tier needed, including benefits administration and workers' compensation, before comparing with a PEO quote. For a business that wants to scale HR support gradually rather than commit to a full PEO at once, Paychex offers the clearest path.
What we like- Flexible tiers from payroll-only to full PEO
- 24/7 live support
- Paychex Flex platform across all 50 states
Watch out for- Per-employee fees sit on top of the base price
- PEO pricing is custom
- Feature depth varies by tier
Starting priceSee website
Free planNo
Justworks is a popular PEO choice for startups because its model is simple: one flat per-employee monthly fee covers payroll, benefits access, compliance support, and HR tools. That simplicity suits a founding team that wants HR handled without learning PEO pricing tiers. The platform covers onboarding, time off, and reporting, and group benefits give small teams better health plan options than they could get alone.
Co-employment is a real commitment, since Justworks becomes the employer of record for tax and benefits purposes, and some owners prefer to keep that role. Very large or complex companies may also outgrow Justworks' streamlined model. For a startup hiring its first ten to fifty employees, Justworks offers one of the cleanest bundles in this list.
What we like- Flat per-employee monthly fee
- Payroll, benefits, and compliance in one bundle
- Simple platform for startups
Watch out for- PEO model means co-employment
- Less suited to very large or complex firms
- Benefits options vary by state
#6
Bambee
Best for: Small businesses that need a dedicated HR manager
Visit bambee.com
Starting price$99 per month
Free planNo
Bambee fills a gap most providers leave open: a small business that needs a real HR person, not a software login. Each client gets a dedicated HR manager who conducts audits, writes custom policies and employee handbooks for the states where the business operates, and guides corrective action and terminations. Published pricing runs from around $99 to $299 per month depending on company size, plus a one-time setup fee.
Bambee does not run payroll or benefits, and it does not transfer employment liability the way a PEO does. A business that needs payroll handled should pair Bambee with a payroll provider or choose a PEO instead. For a small business whose alternative is no HR function at all, Bambee offers expert help at a price a small owner can justify.
What we like- Dedicated HR manager for each client
- Custom policies and handbooks for your states
- Pricing from $99 to $299 per month
Watch out for- No payroll or benefits platform included
- No employment liability transfer
- Platform is thinner than a full HCM
Starting priceSee website
Free planNo
G&A Partners is a Houston-based PEO and HR outsourcing provider that has grown by acquisition, including outsourced accounting firm GrowthForce. That combination lets a service business put HR, payroll, benefits, compliance, and bookkeeping with one provider, which saves coordination time for an owner juggling vendors. The company offers both co-employment and non-co-employment arrangements, so the model is a choice rather than a condition.
Acquisition-built companies can vary across service lines while teams integrate, so a buyer should ask which entity and team will actually serve the account and how long that team has been in place. Pricing is quote-based. For a business that wants HR and accounting under one roof, G&A Partners is a distinctive option.
What we like- PEO and non-co-employment options
- Outsourced accounting through acquisition
- Houston-based with national reach
Watch out for- Pricing is quote-based
- Acquisition-built structure can vary by service line
- Confirm which entity serves your account
Starting priceSee website
Free planNo
Insignia Resources is an HR outsourcing firm often ranked for mid-size companies, with a model built around a dedicated HR manager and strategic guidance rather than a self-service platform. The company serves businesses with 50 to 500 employees that need sophisticated HR support, including compliance, policy, and workforce planning, without hiring a full internal HR department. Insignia also appears on PEO and compliance-focused rankings, which reflects its depth in regulated work.
Pricing is quote-based, and Insignia is smaller than ADP or TriNet, so a buyer should confirm coverage for multi-state operations and benefits administration. For a mid-size company that wants a named HR partner and strategic advice, rather than a large vendor's queue, Insignia Resources is a strong fit.
What we like- Dedicated HR manager model
- Strong fit for 50 to 500 employee firms
- Compliance and strategic guidance included
Watch out for- Pricing is quote-based
- Smaller than ADP or TriNet
- Service depth varies by engagement
How we chose
We compared HR outsourcing roundups, provider service pages, and published pricing, and we kept only firms that exist today and offer outsourced HR or PEO services to US employers. Prices come from provider pages and recent roundups, and anything unpublished is marked See website rather than guessed. We favored a mix of large PEOs, flexible payroll-led providers, a low-cost HR manager service, and mid-size outsourcing firms, since buyers range from a five-person startup to a 500-person company. No hands-on testing is claimed here, and contracts vary, so request a written proposal with per-employee costs and service terms before signing.
PEO, HRO, or a dedicated HR manager
The first choice is the model. A PEO co-employs your staff, which gives you group benefits and transfers some employment liability, but it also means the PEO becomes the employer of record for tax and benefits. An HRO arrangement, or HR outsourcing without co-employment, keeps you as the employer while a vendor handles payroll, compliance, and HR tasks. A dedicated HR manager service like Bambee gives expert advice and policies without running payroll or benefits at all.
What to compare in a proposal
Compare the per-employee monthly cost, the base fee, and what sits outside the quote, such as benefits premiums, workers' compensation, and setup fees. Ask who your day-to-day contact is, how compliance updates are delivered across the states where you operate, and how onboarding, terminations, and employee questions are handled. Also ask about contract length, exit terms, and what happens to benefits and payroll data if you leave. A provider that cannot explain exit terms clearly is a risk.
When outsourcing pays off
Outsourcing pays off once HR work passes about ten to fifteen employees, when payroll, compliance, benefits, and employee questions consume real owner time and mistakes carry penalties. Below that size, a payroll tool plus a service like Bambee may be enough. Above fifty employees, a PEO or full HRO partner usually saves money compared with hiring a full HR team, while also reducing compliance risk. The wrong choice is not the model, but the provider that does not answer the phone when a problem arrives.
Frequently asked questions
What is the best outsourced HR company?
It depends on size and model. TriNet and Insperity lead for mid-size and larger PEO needs, Paychex and ADP TotalSource lead for flexible and large-scale support, Justworks leads for startups, and Bambee leads for small businesses that need a dedicated HR manager at low cost. Compare proposals on per-employee cost, services included, and contract terms.
What is the difference between a PEO and HR outsourcing?
A PEO co-employs your staff and becomes the employer of record for payroll taxes and benefits, which gives access to group benefits and transfers some liability. HR outsourcing without co-employment keeps you as the employer while a vendor handles HR tasks, payroll, or compliance. Choose a PEO for benefits and liability sharing, and HRO for help without co-employment.
How much does outsourced HR cost?
Published figures in this list run from $99 per month at Bambee and around $39 per month plus per-employee fees at Paychex, up to $125 to $200 per employee per month at TriNet. PEO pricing is usually quote-based and depends on headcount, industry, benefits chosen, and state coverage. Ask for the all-in monthly cost before comparing.
Can a small business outsource HR?
Yes. Bambee is built for small businesses, Justworks suits startups, and Paychex offers tiers that scale from payroll-only to full PEO. A business with fewer than ten employees may only need payroll software plus an HR manager service, while a business past fifteen employees usually benefits from fuller outsourcing.
Does an outsourced HR company handle payroll taxes?
Most PEO and HRO providers handle payroll tax calculation, filing, and deposits, and PEOs file under their own employer identification number. Confirm which taxes and states are covered, who is responsible for errors, and how year-end forms are handled before signing. Keep your own records even when a provider files for you.
What happens if I leave a PEO?
Leaving a PEO means payroll, benefits, and tax filings move back to your company or to a new provider, which takes planning. Ask about contract length, notice periods, and data transfer before signing, and time the switch around a quarter boundary where possible. Confirm how health benefits continue for employees during the transition so no one loses coverage.
Sources we checked (8)
- https://www.trinet.com
- https://www.insperity.com
- https://www.adp.com
- https://www.paychex.com
- https://www.justworks.com
- https://www.bambee.com
- https://www.gnapartners.com
- https://www.insigniaresources.com
Is your product missing or out of date?
We review this list regularly. Vendors can request a listing, send updated pricing or ask about featured placement.
Shihab Mia · Founder, Rankite
Shihab has 5+ years in B2B and SaaS SEO. He writes Rankite's software buying guides from pricing pages, documentation and public user reviews. More about Shihab.