Here are life insurers in Sri Lanka frequently recognised for strong customer service, with recent supporting sources you can check:

1. Ceylinco Life — widely cited as the top life insurer for service excellence in Sri Lanka (LMD customer‑service polls, World Finance award, SLIM/Brand awards). Ceylinco highlights digital service channels (app, CRM) and multiple payment options. (ceylincolife.com)

2. AIA Insurance (AIA Sri Lanka) — regularly wins brand and sales/service awards; AIA promotes a large branch network, extensive contact channels and recognised sales/front‑line excellence (IQA/SLIM/Brand Leadership). (aialife.com.lk)

3. Union Assurance — has been publicly recognised for customer service (International Finance Awards / other customer‑service citations), emphasises digital payment links, 24/7 trilingual support and complaint‑management targets. (unionassurance.com)

Notes and quick advice:

• “Best customer service” can be measured by awards, independent surveys, regulator complaint records, online reviews and personal experience (call‑centre speed, claims turnaround, digital self‑service). The three companies above appear repeatedly in media/award listings for service excellence. (ceylincolife.com)
• If you want a deeper comparison I can look up: recent regulator complaint/consumer‑protection statistics (Insurance Regulatory Commission of Sri Lanka), independent customer‑satisfaction survey results (LMD or similar), or recent online reviews for specific insurers — tell me which comparison you prefer and I’ll fetch the latest data.