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EIS Group vs OneShield Software — Policy administration for US insurance, 2026.

EIS Group (12 named carriers) and OneShield Software (5 named carriers) both sit at the policy administration layer. Zero customer overlap in the public roster — they are addressing different segments of the same stack layer.

Last verified 2026-04-22 · methodology

TL;DR

  • EIS Group has 12 publicly-named carrier deployments; OneShield Software has 5. Both at the policy administration layer.
  • Zero customer overlap in the public roster. EIS Group and OneShield Software are addressing different carriers within the same stack layer.
  • Both classified modern on Phidea's generation axis.
  • Both private-equity ownership.
  • Analyst coverage: 1 firm cover both, 2 only EIS Group, 0 only OneShield Software.

Customer overlap

BucketCount
Named on EIS Group only12
Named on OneShield Software only5
Named on both0
of which US-named on at least one side0

Only on EIS Group

  • CSAA Insurance Group (US)
  • Desjardins General Insurance Group (CA)
  • AIG Canada (CA)
  • Tokio Marine & Nichido Fire (JP)
  • Liberty Mutual Benefits (US)
  • Wellfleet Insurance (US)
  • Industrial Alliance Auto and Home (CA)
  • AMI Insurance (NZ)
  • Atlantic American Employee Benefits (US)
  • Renaissance Life & Health Insurance Company of America (US)
  • Reliance Standard (US)
  • Tower Insurance (US)

Only on OneShield Software

  • Privilege Underwriters Reciprocal Exchange (PURE) (US)
  • HAI Group (US)
  • Accident Insurance Company (AIC) (US)
  • Forrest T. Jones & Company (US)
  • Falcon Risk Services (US)

Counts derived from 18sourced carrier-deployment entries across both vendor cards. Aggregate-only statements (e.g. “16 of the top 20”) excluded.

Stack position

EIS Group
Generation
modern
Stack layer
Policy administration
Founded
2008
Lines
auto, home, commercial, life, health
OneShield Software
Generation
modern
Stack layer
Policy administration
Founded
1999
Lines
auto, home, commercial, workers-comp, specialty

Ownership and corporate context

EIS Group
Type
private-equity
Parent
TPG (growth investor)
Acquired
2021

Source: TPG

OneShield Software
Type
private-equity
Parent
Parker-led search fund; Bain Capital Credit and Pacific Lake Partners anchor investors
Acquired
2020

Source: Bain Capital

Carrier-segment specialization

EIS Group — geographic split

  • US
    7
  • CA
    3
  • JP
    1
  • NZ
    1

OneShield Software — geographic split

  • US
    5

Analyst coverage differential

Both covered by
  • Celent · EIS Group (2025: Celent 2025 P&C Policy Administration Systems Report — EIS named Technology Standout (NA and EMEA)) · OneShield Software (2024: OneShield Software — vendor directory and VendorMatch solutions)
Only EIS Group cited by
  • Gartner (2021: Gartner Magic Quadrant for Life Insurance Policy Administration Systems, North America — EIS positioned as a Leader)
  • TPG (2021: Insurance Technology Leader EIS Announces Growth Investment of More than $100 Million from TPG)

Recent news (last 12 months)

No news items in the last 12 months for either tool.

Sourced limitations

EIS Group
  • Many EIS customer references are hosted on EIS's own site or blog rather than third-party case studies. AIG Canada and AMI Insurance are traceable to Celent Model Insurer write-ups; Desjardins, CSAA, Tokio Marine, Wellfleet and Liberty Mutual Benefits references originate from EIS press releases and case studies. Absolute customer count and revenue are not publicly disclosed.
    Source: EIS Group
OneShield Software
  • Smaller systems-integrator ecosystem than the tier-1 P&C cores. The implementation-partner bench for OneShield is narrower than the Guidewire and Duck Creek ecosystems; carriers needing specific tier-1 reinsurance or global-treaty surfaces will typically still choose Guidewire.
    Source: Celent
  • Customer mix skews toward MGAs, specialty carriers, and workers' comp writers by design. The named roster does not include top-10 national P&C carriers; OneShield Market Solutions specifically targets MGAs with sub-$100M GWP — a segment Guidewire does not economically serve.
    Source: Celent

Limitations published on Phidea are sourced to the underlying citation and reflect what is publicly named — not an exhaustive list. Consult the vendor card for the full record.

Frequently asked

Do any carriers run both EIS Group and OneShield Software?
Not in Phidea's public roster. Across 17 sourced carrier-deployment entries on both vendor cards, zero carriers appear on both. The two tools are addressing different carriers within the same stack layer.
Who owns EIS Group and OneShield Software?
EIS Group is PE-owned (TPG (growth investor)). OneShield Software is PE-owned (Parker-led search fund; Bain Capital Credit and Pacific Lake Partners anchor investors).
Which has more named US carriers?
EIS Group has the larger publicly-named US roster: EIS Group 7, OneShield Software 6. Public-roster size is a coverage signal, not a quality signal — vendors with stronger NDAs may have larger actual US footprints than the public count shows.
Where are these tools positioned in the insurance stack?
Both sit at the policy administration layer. EIS Group operates as a standalone vendor; OneShield Software operates as a standalone vendor.

Adjacent reading