diff --git a/addons/crm/models/crm_lead.py b/addons/crm/models/crm_lead.py
index afff697394e..0136ae72a1f 100644
--- a/addons/crm/models/crm_lead.py
+++ b/addons/crm/models/crm_lead.py
@@ -8,6 +8,7 @@ from datetime import date, datetime, timedelta
 from psycopg2 import sql
 
 from odoo import api, fields, models, tools, SUPERUSER_ID
+from odoo.addons.iap.tools import iap_tools
 from odoo.addons.mail.tools import mail_validation
 from odoo.addons.phone_validation.tools import phone_validation
 from odoo.exceptions import UserError, AccessError
@@ -224,6 +225,8 @@ class Lead(models.Model):
         index=True, ondelete='restrict', tracking=True)
     # Statistics
     meeting_count = fields.Integer('# Meetings', compute='_compute_meeting_count')
+    duplicate_lead_ids = fields.Many2many("crm.lead", compute="_compute_potential_lead_duplicates", string="Potential Duplicate Lead", context={"active_test": False})
+    duplicate_lead_count = fields.Integer(compute="_compute_potential_lead_duplicates", string="Potential Duplicate Lead Count")
     # UX
     ribbon_message = fields.Char('Ribbon message', compute='_compute_ribbon_message')
 
@@ -502,6 +505,73 @@ class Lead(models.Model):
         for lead in self:
             lead.meeting_count = mapped_data.get(lead.id, 0)
 
+    @api.depends('email_from', 'partner_id', 'contact_name', 'partner_name')
+    def _compute_potential_lead_duplicates(self):
+        MIN_EMAIL_LENGTH = 7
+        MIN_NAME_LENGTH = 6
+        SEARCH_RESULT_LIMIT = 21
+
+        def return_if_relevant(model_name, domain):
+            """ Returns the recordset obtained by performing a search on the provided
+            model with the provided domain if the cardinality of that recordset is
+            below a given threshold (i.e: `SEARCH_RESULT_LIMIT`). Otherwise, returns
+            an empty recordset of the provided model as it indicates search term
+            was not relevant.
+
+            Note: The function will use the administrator privileges to guarantee
+            that a maximum amount of leads will be included in the search results
+            and transcend multi-company record rules. It also includes archived records.
+            Idea is that counter indicates duplicates are present and that lead
+            could be escalated to managers.
+            """
+            # Includes archived records and transcend multi-company record rules
+            model = self.env[model_name].sudo().with_context(active_test=False)
+            res = model.search(domain, limit=SEARCH_RESULT_LIMIT)
+            return res if len(res) < SEARCH_RESULT_LIMIT else model
+
+        def get_email_to_search(email):
+            """ Returns the full email address if the domain of the email address
+            is common (i.e: in the mail domain blacklist). Otherwise, returns
+            the domain of the email address. A minimal length is required to avoid
+            returning false positives records. """
+            if not email or len(email) < MIN_EMAIL_LENGTH:
+                return False
+            parts = email.rsplit('@', maxsplit=1)
+            if len(parts) > 1:
+                email_domain = parts[1]
+                if email_domain not in iap_tools._MAIL_DOMAIN_BLACKLIST:
+                    return '@' + email_domain
+            return email
+
+        for lead in self:
+            lead_id = lead._origin.id if isinstance(lead.id, models.NewId) else lead.id
+            common_lead_domain = [
+                ('id', '!=', lead_id)
+            ]
+
+            duplicate_lead_ids = self.env['crm.lead']
+            email_search = get_email_to_search(lead.email_from)
+
+            if email_search:
+                duplicate_lead_ids |= return_if_relevant('crm.lead', common_lead_domain + [
+                    ('email_from', 'ilike', email_search)
+                ])
+            if lead.partner_name and len(lead.partner_name) >= MIN_NAME_LENGTH:
+                duplicate_lead_ids |= return_if_relevant('crm.lead', common_lead_domain + [
+                    ('partner_name', 'ilike', lead.partner_name)
+                ])
+            if lead.contact_name and len(lead.contact_name) >= MIN_NAME_LENGTH:
+                duplicate_lead_ids |= return_if_relevant('crm.lead', common_lead_domain + [
+                    ('contact_name', 'ilike', lead.contact_name)
+                ])
+            if lead.partner_id and lead.partner_id.commercial_partner_id:
+                duplicate_lead_ids |= lead.with_context(active_test=False).search(common_lead_domain + [
+                    ("partner_id", "child_of", lead.partner_id.commercial_partner_id.id)
+                ])
+
+            lead.duplicate_lead_ids = duplicate_lead_ids + lead
+            lead.duplicate_lead_count = len(duplicate_lead_ids)
+
     @api.depends('email_from', 'phone', 'partner_id')
     def _compute_ribbon_message(self):
         for lead in self:
@@ -967,6 +1037,19 @@ class Lead(models.Model):
             action['context']['initial_date'] = next_activity.calendar_event_id.start
         return action
 
+    def action_show_potential_duplicates(self):
+        """ Open kanban view to display duplicate leads or opportunity.
+            :return dict: dictionary value for created kanban view
+        """
+        self.ensure_one()
+        action = self.env["ir.actions.actions"]._for_xml_id("crm.crm_lead_action_duplicates")
+        action['domain'] = [('id', 'in', self.duplicate_lead_ids.ids)]
+        action['context'] = {
+            'active_test': False,
+            'create': False
+        }
+        return action
+
     def action_snooze(self):
         self.ensure_one()
         today = date.today()
diff --git a/addons/crm/static/src/scss/crm.scss b/addons/crm/static/src/scss/crm.scss
new file mode 100644
index 00000000000..bfb557d65f3
--- /dev/null
+++ b/addons/crm/static/src/scss/crm.scss
@@ -0,0 +1,33 @@
+.o_opportunity_kanban {
+    .ribbon {
+        &::before, &::after {
+            display: none;
+        }
+        span {
+            background-color: $o-brand-odoo;
+            padding: 5px;
+            font-size: small;
+            z-index: 0;
+        }
+    }
+
+    .ribbon-top-right {
+        margin-top: -9px;
+        span {
+            left: 12px;
+            right: 30px;
+            height: 25px;
+            top: 18px;
+        }
+    }
+
+    .oe_kanban_card[data-ribbon="true"] {
+        min-height: 105px;
+        .o_kanban_record_title {
+            max-width: calc(100% - 65px);
+        }
+        .o_kanban_record_subtitle {
+            max-width: calc(100% - 35px);
+        }
+    }
+}
diff --git a/addons/crm/tests/__init__.py b/addons/crm/tests/__init__.py
index 647f4cd0edf..d5809eb9001 100644
--- a/addons/crm/tests/__init__.py
+++ b/addons/crm/tests/__init__.py
@@ -5,6 +5,7 @@ from . import test_crm_lead_assignment
 from . import test_crm_lead_notification
 from . import test_crm_lead_convert
 from . import test_crm_lead_convert_mass
+from . import test_crm_lead_duplicates
 from . import test_crm_lead_lost
 from . import test_crm_lead_merge
 from . import test_crm_activity
diff --git a/addons/crm/tests/test_crm_lead_duplicates.py b/addons/crm/tests/test_crm_lead_duplicates.py
new file mode 100644
index 00000000000..c420f2b0a30
--- /dev/null
+++ b/addons/crm/tests/test_crm_lead_duplicates.py
@@ -0,0 +1,170 @@
+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from odoo.addons.crm.tests.common import TestCrmCommon
+from odoo.tests.common import tagged, users
+
+
+@tagged('lead_manage')
+class TestLeadConvert(TestCrmCommon):
+
+    @users('user_sales_manager')
+    def test_potential_duplicates(self):
+        company = self.env['res.partner'].create({
+            'name': 'My company',
+            'email': 'mycompany@company.com',
+            'is_company': True,
+            'street': '57th Street',
+            'city': 'New New York',
+            'country_id': self.env.ref('base.us').id,
+            'zip': '12345',
+        })
+
+        partner_1 = self.env['res.partner'].create({
+            'name': 'Dave',
+            'email': 'dave@odoo.com',
+            'mobile': '+1 202 555 0123',
+            'phone': False,
+            'parent_id': company.id,
+            'is_company': False,
+            'street': 'Pearl street',
+            'city': 'California',
+            'country_id': self.env.ref('base.us').id,
+            'zip': '95826',
+        })
+        partner_2 = self.env['res.partner'].create({
+            'name': 'Eve',
+            'email': 'eve@odoo.com',
+            'mobile': '+1 202 555 3210',
+            'phone': False,
+            'parent_id': company.id,
+            'is_company': False,
+            'street': 'Wall street',
+            'city': 'New York',
+            'country_id': self.env.ref('base.us').id,
+            'zip': '54321',
+        })
+
+        lead_1 = self.env['crm.lead'].create({
+            'name': 'Lead 1',
+            'type': 'lead',
+            'partner_name': 'Alice',
+            'email_from': 'alice@odoo.com',
+        })
+        lead_2 = self.env['crm.lead'].create({
+            'name': 'Opportunity 1',
+            'type': 'opportunity',
+            'email_from': 'alice@odoo.com',
+        })
+        lead_3 = self.env['crm.lead'].create({
+            'name': 'Opportunity 2',
+            'type': 'opportunity',
+            'email_from': 'alice@odoo.com',
+        })
+        lead_4 = self.env['crm.lead'].create({
+            'name': 'Lead 2',
+            'type': 'lead',
+            'partner_name': 'Alice Doe'
+        })
+        lead_5 = self.env['crm.lead'].create({
+            'name': 'Opportunity 3',
+            'type': 'opportunity',
+            'partner_name': 'Alice Doe'
+        })
+        lead_6 = self.env['crm.lead'].create({
+            'name': 'Opportunity 4',
+            'type': 'opportunity',
+            'partner_name': 'Bob Doe'
+        })
+        lead_7 = self.env['crm.lead'].create({
+            'name': 'Opportunity 5',
+            'type': 'opportunity',
+            'partner_name': 'Bob Doe',
+            'email_from': 'bob@odoo.com',
+        })
+        lead_8 = self.env['crm.lead'].create({
+            'name': 'Opportunity 6',
+            'type': 'opportunity',
+            'email_from': 'bob@mymail.com',
+        })
+        lead_9 = self.env['crm.lead'].create({
+            'name': 'Opportunity 7',
+            'type': 'opportunity',
+            'email_from': 'alice@mymail.com',
+        })
+        lead_10 = self.env['crm.lead'].create({
+            'name': 'Opportunity 8',
+            'type': 'opportunity',
+            'probability': 0,
+            'active': False,
+            'email_from': 'alice@mymail.com',
+        })
+        lead_11 = self.env['crm.lead'].create({
+            'name': 'Opportunity 9',
+            'type': 'opportunity',
+            'contact_name': 'charlie'
+        })
+        lead_12 = self.env['crm.lead'].create({
+            'name': 'Opportunity 10',
+            'type': 'opportunity',
+            'contact_name': 'Charlie Chapelin',
+        })
+        lead_13 = self.env['crm.lead'].create({
+            'name': 'Opportunity 8',
+            'type': 'opportunity',
+            'partner_id': partner_1.id
+        })
+        lead_14 = self.env['crm.lead'].create({
+            'name': 'Lead 3',
+            'type': 'lead',
+            'partner_id': partner_2.id
+        })
+
+        self.assertEqual(lead_1 + lead_2 + lead_3, lead_1.duplicate_lead_ids)
+        self.assertEqual(lead_1 + lead_2 + lead_3, lead_2.duplicate_lead_ids)
+        self.assertEqual(lead_1 + lead_2 + lead_3, lead_3.duplicate_lead_ids)
+        self.assertEqual(lead_4 + lead_5, lead_4.duplicate_lead_ids)
+        self.assertEqual(lead_4 + lead_5, lead_5.duplicate_lead_ids)
+        self.assertEqual(lead_6 + lead_7, lead_6.duplicate_lead_ids)
+        self.assertEqual(lead_6 + lead_7, lead_7.duplicate_lead_ids)
+        self.assertEqual(lead_8 + lead_9 + lead_10, lead_8.duplicate_lead_ids)
+        self.assertEqual(lead_8 + lead_9 + lead_10, lead_9.duplicate_lead_ids)
+        self.assertEqual(lead_8 + lead_9 + lead_10, lead_10.duplicate_lead_ids)
+        self.assertEqual(lead_11 + lead_12, lead_11.duplicate_lead_ids)
+        self.assertEqual(lead_12, lead_12.duplicate_lead_ids)
+        self.assertEqual(lead_13 + lead_14, lead_13.duplicate_lead_ids)
+        self.assertEqual(lead_13 + lead_14, lead_14.duplicate_lead_ids)
+
+    @users('user_sales_manager')
+    def test_potential_duplicates_with_invalid_email(self):
+        lead_1 = self.env['crm.lead'].create({
+            'name': 'Lead 1',
+            'type': 'lead',
+            'email_from': 'mail"1@mymail.com'
+        })
+        lead_2 = self.env['crm.lead'].create({
+            'name': 'Opportunity 1',
+            'type': 'opportunity',
+            'email_from': 'mail2@mymail.com'
+        })
+        lead_3 = self.env['crm.lead'].create({
+            'name': 'Opportunity 2',
+            'type': 'lead',
+            'email_from': 'odoo.com'
+        })
+        lead_4 = self.env['crm.lead'].create({
+            'name': 'Opportunity 3',
+            'type': 'opportunity',
+            'email_from': 'odoo.com'
+        })
+        lead_5 = self.env['crm.lead'].create({
+            'name': 'Opportunity 3',
+            'type': 'opportunity',
+            'email_from': 'myodoo.com'
+        })
+
+        self.assertEqual(lead_1 + lead_2, lead_1.duplicate_lead_ids)
+        self.assertEqual(lead_1 + lead_2, lead_2.duplicate_lead_ids)
+        self.assertEqual(lead_3 + lead_4 + lead_5, lead_3.duplicate_lead_ids)
+        self.assertEqual(lead_3 + lead_4 + lead_5, lead_4.duplicate_lead_ids)
+        self.assertEqual(lead_5, lead_5.duplicate_lead_ids)
diff --git a/addons/crm/views/assets.xml b/addons/crm/views/assets.xml
index 76faa781844..e1111a4affa 100644
--- a/addons/crm/views/assets.xml
+++ b/addons/crm/views/assets.xml
@@ -8,6 +8,7 @@
             <script type="text/javascript" src="/crm/static/src/js/tours/crm.js"></script>
         </xpath>
         <xpath expr="." position="inside">
+            <link rel="stylesheet" type="text/scss" href="/crm/static/src/scss/crm.scss"/>
             <link rel="stylesheet" type="text/scss" href="/crm/static/src/scss/crm_team_member_views.scss"></link>
         </xpath>
     </template>
diff --git a/addons/crm/views/crm_lead_views.xml b/addons/crm/views/crm_lead_views.xml
index 392c1f974f3..ab7f2c66b74 100644
--- a/addons/crm/views/crm_lead_views.xml
+++ b/addons/crm/views/crm_lead_views.xml
@@ -38,6 +38,15 @@
                                     <span class="o_stat_text" attrs="{'invisible': [('meeting_count', '&gt;', 1)]}"> Meeting</span>
                                 </div>
                             </button>
+                            <button name="action_show_potential_duplicates" type="object"
+                                class="oe_stat_button" icon="fa-star"
+                                attrs="{'invisible': [('duplicate_lead_count', '&lt;', 1)]}">
+                                <div class="o_stat_info">
+                                    <field name="duplicate_lead_count" class="o_stat_value"/>
+                                    <span class="o_stat_text" attrs="{'invisible': [('duplicate_lead_count', '&lt;', 2)]}">Similar Leads</span>
+                                    <span class="o_stat_text" attrs="{'invisible': [('duplicate_lead_count', '&gt;', 1)]}">Similar Lead</span>
+                                </div>
+                            </button>
                         </div>
                         <widget name="web_ribbon" title="Lost" bg_color="bg-danger" attrs="{'invisible': ['|', ('probability', '&gt;', 0), ('active', '=', True)]}"/>
                         <widget name="web_ribbon" title="Won" attrs="{'invisible': [('probability', '&lt;', 100)]}" />
@@ -511,7 +520,7 @@
                     <progressbar field="activity_state" colors='{"planned": "success", "today": "warning", "overdue": "danger"}' sum_field="expected_revenue" help="This bar allows to filter the opportunities based on scheduled activities."/>
                     <templates>
                         <t t-name="kanban-box">
-                            <div t-attf-class="#{!selection_mode ? kanban_color(record.color.raw_value) : ''} oe_kanban_global_click">
+                            <div t-attf-class="#{!selection_mode ? kanban_color(record.color.raw_value) : ''} oe_kanban_global_click oe_kanban_card d-flex flex-column">
                                 <div class="o_dropdown_kanban dropdown">
 
                                     <a class="dropdown-toggle o-no-caret btn" role="button" data-toggle="dropdown" data-display="static" href="#" aria-label="Dropdown menu" title="Dropdown menu">
@@ -523,7 +532,7 @@
                                         <ul class="oe_kanban_colorpicker" data-field="color"/>
                                     </div>
                                 </div>
-                                <div class="oe_kanban_content">
+                                <div class="oe_kanban_content flex-grow-1">
                                     <div class="o_kanban_record_title oe_kanban_details">
                                         <strong><field name="name"/></strong>
                                     </div>
@@ -543,6 +552,8 @@
                                     <div>
                                         <field name="tag_ids" widget="many2many_tags" options="{'color_field': 'color'}"/>
                                     </div>
+                                </div>
+                                <div class="oe_kanban_footer">
                                     <div class="o_kanban_record_bottom">
                                         <div class="oe_kanban_bottom_left">
                                             <field name="priority" widget="priority" groups="base.group_user"/>
@@ -1065,6 +1076,52 @@ if record:
             <field name="act_window_id" ref="crm_lead_action_pipeline"/>
         </record>
 
+        <record id="crm_lead_action_duplicates" model="ir.actions.act_window">
+            <field name="name">Similar Leads</field>
+            <field name="res_model">crm.lead</field>
+            <field name="view_mode">tree,form,kanban</field>
+            <field name="search_view_id" ref="crm.view_crm_case_leads_filter"/>
+        </record>
+
+        <record id="crm_lead_view_kanban_duplicates" model="ir.ui.view">
+            <field name="name">crm.lead.view.kanban.duplicates</field>
+            <field name="model">crm.lead</field>
+            <field name="mode">primary</field>
+            <field name="inherit_id" ref="crm.crm_case_kanban_view_leads"/>
+            <field name="arch" type="xml">
+                <xpath expr="//kanban" position="inside">
+                    <field name="probability" invisible="1"/>
+                </xpath>
+                <xpath expr="//div" position="attributes">
+                    <attribute name="t-att-data-ribbon">((
+                        !record.active.raw_value and
+                        record.probability and
+                        record.probability.raw_value == 0
+                    ) or (
+                        record.active.raw_value and
+                        record.probability and
+                        record.probability.raw_value == 100
+                    ))</attribute>
+                </xpath>
+                <xpath expr="//div[hasclass('o_dropdown_kanban')]" position="before">
+                    <div class="ribbon ribbon-top-right"
+                        attrs="{'invisible': ['|', ('probability', '&gt;', 0), ('active', '=', True)]}">
+                        <span class="bg-danger">Lost</span>
+                    </div>
+                    <div class="ribbon ribbon-top-right"
+                        attrs="{'invisible': [('probability', '&lt;', 100)]}">
+                        <span class="bg-success">Won</span>
+                    </div>
+                </xpath>
+            </field>
+        </record>
+
+        <record id="crm_lead_action_duplicates_view_kanban" model="ir.actions.act_window.view">
+            <field name="view_mode">kanban</field>
+            <field name="view_id" ref="crm_lead_view_kanban_duplicates"/>
+            <field name="act_window_id" ref="crm_lead_action_duplicates"/>
+        </record>
+
         <record id="menu_crm_opportunities" model="ir.ui.menu">
             <field name="action" ref="crm.action_your_pipeline"/>
         </record>
diff --git a/addons/event_crm/views/crm_lead_views.xml b/addons/event_crm/views/crm_lead_views.xml
index 2a6674ab81a..7029052bcd4 100644
--- a/addons/event_crm/views/crm_lead_views.xml
+++ b/addons/event_crm/views/crm_lead_views.xml
@@ -19,7 +19,7 @@
         <field name="model">crm.lead</field>
         <field name="inherit_id" ref="crm.crm_lead_view_form"/>
         <field name="arch" type="xml">
-            <xpath expr="//div[@name='button_box']" position="inside">
+            <xpath expr="//button[@name='action_schedule_meeting']" position="after">
                 <field name="registration_ids" invisible="1"/>
                 <button name="%(event_registration_action_from_lead)d" type="action" class="oe_stat_button" icon="fa-ticket"
                     attrs="{'invisible': [('registration_count', '=', 0)]}" groups="event.group_event_user">
diff --git a/addons/website_crm/views/website_crm_lead_views.xml b/addons/website_crm/views/website_crm_lead_views.xml
index 8ed3b5e1a26..c06b5eecaef 100644
--- a/addons/website_crm/views/website_crm_lead_views.xml
+++ b/addons/website_crm/views/website_crm_lead_views.xml
@@ -5,7 +5,7 @@
         <field name="model">crm.lead</field>
         <field name="inherit_id" ref="crm.crm_lead_view_form"/>
         <field name="arch" type="xml">
-            <xpath expr="//div[hasclass('oe_button_box')]" position="inside">
+            <xpath expr="//button[@name='action_schedule_meeting']" position="after">
                 <button name="action_redirect_to_page_views" type="object" class="oe_stat_button" icon="fa-tags"
                         attrs="{'invisible': [('visitor_page_count', '=', 0)]}">
                     <field name="visitor_page_count" widget="statinfo" string="Page views"/>