Grinnell vs. Plymouth Rock Insurance

Which insurance carrier is right for you? Compare ratings, savings, and quotes from Grinnell and Plymouth Rock.

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Grinnell vs. Plymouth Rock: What You Need to Know

Since 1909, Ginnell Mutual has been insuring people, and today it is the 114th-largest property-casualty insurance company in the U.S.. and the largest primary reinsurer of farm mutual companies in North America. Their insurance products are sold in 19 states.

In 1982, the former Massachusetts Insurance Commissioner Jim Stone founded a new car insurance agency committed to the highest level of customer care and satisfaction. Plymouth Rock Assurance is a member of the Plymouth Rock Group of Companies, which together write and manage more than $1 billion in annual auto and homeowners’ insurance premiums. Plymouth Rock Assurance serves the Northeast, specifically Massachusetts, Connecticut, New Hampshire, New Jersey, and Pennsylvania. The Plymouth Rock’s Pledge of Assurance is that you will always have a friendly person answer your call during business hours; your questions will be answered and the matter resolved quickly and accurately; everything about your issues will be explained clearly; if you are unable to get the matter resolved you can speak with a supervisor or manager; and at the end of the call, you will know exactly what to do next and how Plymouth Rock will keep you informed. The pledge also includes the promise that accurate policies and statements will be issued the first time around; claims will be handled professionally and sensitively; physical damage assessments within scheduled hours and without unreasonable delays; guarantee of all repairs by approved providers; and the promise to do the best for customers with extra effort.

Below is a list of average rates, rankings, products, and discounts for the two companies. For full company overviews, you can visit Grinnell Mutual Overview and Plymouth Rock Assurance Overview.

Grinnell Mutual vs. Plymouth Rock Assurance: How much are the Average Rates?

Below is a list of the average rates that drivers typically pay with Grinnell Mutual and Plymouth Rock Assurance. On average, Grinnell Mutual charges approximately $186.18 per month while Plymouth Rock Assurance comes in at around $167.70 per month. For Grinnell Mutual, the cheapest state average is at $0.00 per month and the most expensive is at $0.00 per month. For Plymouth Rock Assurance, the cheapest state average is Massachusetts at $167.70 per month and the most expensive is Massachusetts at $167.70 per month.

Grinnell Mutual

Average Rate

Plymouth Rock Assurance

Average Rate


Average Rate

State Grinnell Mutual Plymouth Rock Assurance
Massachusetts- $167.70

Grinnell Mutual vs. Plymouth Rock Assurance: Rates by Number of Vehicle


Drivers will typically get a discount if they insure multiple vehicles. Here is a list of average rates that Grinnell Mutual and Plymouth Rock Assurance typically charge for drivers who have more than 1 vehicle.

Number of Vehicles Grinnell Mutual Plymouth Rock Assurance
1 Vehicle $ $167.70

Grinnell Mutual vs. Plymouth Rock Assurance: Rates by Homeownership

Rates Are Not Currently Available

What is Grinnell and Plymouth Rock Insurance Rating?

Which car insurance company is better? We've made it easy to compare companies side by side. See how Grinnell and Plymouth Rock ranked among the industry ratings.

ComparisonGrinnellPlymouth Rock
Year Founded19091982
Market Share6.02% (2017)
A.M. Best RatingAA-
BBB RatingA+A+
Financial StrengthExcellentExcellent
JD PowerAmong the Best
S&P RatingA

Grinnell or Plymouth Rock: Insurance Products Offered

What coverage is available through Grinnell and Plymouth Rock? Both insurance companies offer Auto, Commercial, Home, Renters, and Umbrella insurance. Additional products from Grinnell insurance also includes Farm insurance. Considering these two top insurance providers? Check out the list below. To view a full list of products that are available, visit Grinnell Mutual and Plymouth Rock Assurance Insurance page.

InsuranceGrinnellPlymouth Rock
Auto Insurance
Commercial Insurance
Condo Insurance
Farm Insurance
Home Insurance
Renters Insurance
Umbrella Insurance

Grinnell or Plymouth Rock: Ways To Save

Grinnell offers a wide range of discounts to its policyholders, including Anti-lock Brakes, Anti-theft, and Claim-free discounts. Whereas, Plymouth Rock also offers a few discounts that Grinnell doesn’t, including Safety Pledge, Pay-in-Full, and No Accident discounts. Start taking advantage of discounts offered by insurance providers like Plymouth Rock and Grinnell insurance and save yourself some money. You can review the full list of discounts that these two companies offer below.

GrinnellPlymouth Rock
Anniversary DiscountAARP Member Program of MA
Anti-lock Brakes DiscountAffinity Group Discounts
Anti-theft DiscountAge of Home Discount
Claim-free DiscountAnti-theft Discount
Defensive Driver DiscountAway at School Discount
Electronic Funds Transfer DiscountCompanion Policy Discount
Elite Driver (Good Driver)Connected Homes Discount (only in PA and NJ)
Excess Vehicles DiscountDefensive Driving Course Discounts
Good Student DiscountDriver Training Discount
Mile MarkereDocuments Discount
Minor Violation ForgivenesseDocuments Savings
Motor Homes Limited Use DiscountGood Student Discount
Multi-Car DiscountHealth Care Primary
Multi-policy DiscountMotor Club Discount
Paid-in-Full DiscountNew Business Discount
Passive Restraint/Airbags DiscountNew Driver Discount
Small At-fault Accident ForgivenessNew Jersey Teachers Auto Insurance
No Accident Discount
Pay-in-Full Discount
Safety Pledge Discount

Pros & Cons of Grinnell & Plymouth Rock


  • Grinnell offers good customer service and reliable insurance products.
  • Customized commercial policies.
Plymouth Rock
  • Plymouth Rock offers many discounts for home and auto.
  • Boasts financial strength.
  • Offers tiered auto insurance protection options, which are more economical than buying a la carte.


  • Grinnell auto insurance is only available in 19 states.
Plymouth Rock
  • Plymouth Rock only serves New Jersey, Massachusetts, Connecticut, New Hampshire, Pennsylvania, and New York

Grinnell or Plymouth Rock Mobile Apps Options

The Plymouth Rock Mobile app allows access to your policy, 24 hours a day,7 days a week. You can use it to report a claim, schedule an inspection or submit photos of the damages and/or claim scene. You can also access claim information and view copies of vehicle appraisals.

Grinnell Mobile App
Grinnell does not currently have a mobile app.
Plymouth Rock Mobile App
iOS     1.3107 user reviews
Android     3127 user reviews

Grinnell & Plymouth Rock Contact Info

Grinnell Contact Info
Address4215 Highway 146 South, P.O. Box 790, Grinnell, IA 50112-0790
Plymouth Rock Contact Info
AddressPO Box 900, Lincroft, NJ 07738-0900
Phone1 (800) 437-3535

The statistics listed on this page are from our own in house reporting. We track and record quotes that carriers have provided based on various criteria. The rates and averages shown on this page should only be used as an estimate.

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